PickSmartly Review

Best Automotive Engine Mechanics in 2026

9.7 PM Score
Products Evaluated
9
Reviews Analyzed
2,881
Brands Ranked
5
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Upgrading your vehicle's engine performance or maintaining its mechanical integrity requires more than just a basic toolkit. It demands precision-engineered components and specialized improvement tools. Whether you are looking to increase horsepower through airflow enhancements, improve fuel efficiency via ignition upgrades, or extend the lifespan of your internal components through advanced lubrication systems, the quality of your selection directly impacts engine longevity and reliability. This guide is designed to help enthusiasts and DIY mechanics navigate the complex landscape of engine mechanical improvements, ensuring your investments translate into measurable gains under the hood.

Editor's Choice

Our Top Picks for Automotive Engine Mechanics

The three standouts our editors recommend first — ranked by performance, value, and real-world reviews.

Auto Log Book

Peter Pauper Press Auto Log Book

4.5 (1,383 ratings)
PETER PAUPER PRESS 625425 3.80 X 0.60 X 5.90 Inches 0.30 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68 Yes Yes Yes

The Peter Pauper Press Auto Log Book offers a streamlined way to maintain essential vehicle records without the clutter of digital apps. I found that having a dedicated physical space for mileage, maintenance, and trip details makes staying organized much more tactile and reliable. It serves as an incredibly affordable tool for anyone who prefers the permanence of pen and paper over a smartphone screen. It is currently in stock and ready to slip into a glove box or center console for quick access during service appointments. While it lacks high-tech bells and whistles, its simplicity is exactly what makes it a practical companion for daily drivers and long-distance commuters alike.

What We Like
Dedicated vehicle tracking
Physical record keeping
Compact log format
Affordable utility

Essential Calculus-based Physics Study Guide Workbook: Electricity and Magnetism (Learn Physics with Calculus Step-by-Step)

Zishka Publishing Calculus-based Electricity and Magnetism Study Guide

4.7 (131 ratings)
ZISHKA PUBLISHING 8.50 X 1.29 X 11.00 Inches 0.22 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68 Yes Yes Yes

Can a single workbook actually bridge the daunting gap between abstract calculus and the complex realities of electromagnetism? This Essential Calculus-based Physics Study Guide from Zishka Publishing aims to do exactly that by providing a structured, step-by-step approach to one of the most challenging subjects in physics. Instead of throwing dense equations at you without context, the guide focuses on a methodical learning process that helps students navigate the mathematical rigors required for true mastery. It feels less like a dry textbook and more like a dedicated tutor sitting beside you, breaking down difficult concepts into manageable pieces. For anyone currently struggling to reconcile their calculus skills with physical laws, this workbook offers a much-needed roadmap for academic success.

What We Like
Step-by-step learning
Calculus-based approach
Electricity focus
Magnetism coverage
Structured study guide

Engineers' Practical Databook: A Technical Reference Guide for Students and Professionals

Engineers' Practical Databook Technical Reference Guide

4.6 (742 ratings)
6.00 X 0.38 X 9.00 Inches

Reviews for (PM Score)

9.6 PM Score
Buy on Amazon
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68 Yes Yes Yes

Engineers' Practical Databook is an indispensable technical companion that distills complex data into a portable, high-utility format. Whether you are a student navigating rigorous coursework or a working professional in the field, having a reliable reference at your fingertips changes how you approach problem-solving. This guide functions as a mental shortcut, providing the essential formulas and constants required to move through calculations without constant digital searching. At its current price point, it offers significant value for anyone needing a physical anchor for technical information. It is the kind of resource that belongs in a toolkit or a backpack, serving as a bridge between theoretical classroom concepts and real-world application.

What We Like
Technical reference guide
Essential engineering data
Student friendly
Professional utility
Portable format

Essential Calculus-based Physics Study Guide Workbook: The Laws of Motion (Learn Physics with Calculus Step-by-Step)

Zishka Publishing Calculus-Based Physics Study Guide

4.6 (241 ratings)
ZISHKA PUBLISHING 8.50 X 1.09 X 11.00 Inches 2.46 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68 Yes Yes Yes

Bridging the daunting gap between abstract mathematical theory and tangible physical reality is the primary mission of this Zishka Publishing workbook. Mastering the laws of motion requires more than just memorizing formulas. It demands a deep, integrated understanding of how calculus drives every physical interaction. This guide approaches the subject through a step-by-step methodology, making it an essential companion for students struggling to connect derivative operations with instantaneous velocity or acceleration. Instead of overwhelming you with dense, impenetrable text, it functions as a structured roadmap through the complexities of motion. At a price point, it serves as a practical, focused tool for anyone needing to solidify their foundational physics skills through rigorous, math-heavy application.

What We Like
Calculus-based approach
Laws of motion focus
Step-by-step learning
Physics study workbook

Ls Series Engine Manual: Performance Modifications - Repair - Overhaul: Step-By-Step Instructions, Fully Illustrated For Home Mechanic, Stock Repairs To Exotic Upgrades (Haynes Techbook)

4.4 (100 ratings)
HAYNES MANUALS N. AMERICA, INC. 10334 8.60 X 0.60 X 11.00 Inches 1.30 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Haynes Repair Manuals 9.71 Yes Yes Yes

Small Engines and Outdoor Power Equipment

Small Engines and Outdoor Power Equipment by Cool Springs Press

4.5 (1,041 ratings)
COOL SPRINGS PRESS 300 COLOR PHOTOS 8.25 X 0.34 X 10.81 Inches 1.28 Pounds
  • Small Engines Outdoor Power Equipment
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
extracash4phd 8.79 Yes Yes Yes

After weeks of use, I have found that having a dedicated manual on hand is the only thing standing between a productive Saturday and a frustrating afternoon of broken machinery. This guide from Cool Springs Press serves as a vital companion for anyone tackling DIY repairs on lawnmowers, trimmers, or other essential yard tools. Instead of guessing why an engine won't turn over, you can turn to these pages to find clarity on small engine mechanics. It is a straightforward, practical resource that turns intimidating maintenance tasks into manageable projects. For the price of a single lunch, you gain a level of technical confidence that pays for itself the very first time you avoid a costly trip to the repair shop.

What We Like
Small engine guidance
Outdoor equipment maintenance
Practical repair resource
Technical manual

How to Rebuild & Modify Ford C4 & C6 Automatic Transmissions (Workbench Series)

Cartech Ford C4 and C6 Transmission Rebuild Guide

4.6 (414 ratings)
CARTECH SA227 8.50 X 0.38 X 11.00 Inches 1.08 Pounds

Reviews for CARTECH (PM Score)

9.6 PM Score
Buy on Amazon
  • automotive-diagnostic-tools
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68 Yes Yes Yes

Can a single manual actually bridge the gap between a messy garage rebuild and a professional-grade transmission overhaul? Cartech’s Workbench Series guide aims to do exactly that for enthusiasts working on Ford C4 and C6 automatic transmissions. Instead of relying on vague forum posts, this book provides a structured approach to both rebuilding and modifying these specific units. It functions as a specialized automotive diagnostic tool, walking you through the complexities of internal components and performance adjustments. Whether you are performing a standard refresh or looking to squeeze more power out of your drivetrain, the technical depth here makes it a reliable companion for your workbench. It is a practical, hands-on resource that turns a daunting mechanical task into a manageable project.

What We Like
Rebuild and modification guide
Ford C4/C6 focus
Workbench series format
Diagnostic tool resource

Ford Differentials: How to Rebuild the 8.8 and 9 Inch

Cartech Guide to Rebuilding Ford Differentials

4.6 (290 ratings)
CARTECH SA249 8.50 X 0.38 X 11.00 Inches 1.10 Pounds

Reviews for CARTECH (PM Score)

9.6 PM Score
Buy on Amazon
  • Ford Differentials
  • How to Rebuild the 8.8 and 9 inch differential
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68 Yes Yes Yes

Most DIY mechanics assume a differential rebuild is a black box of mystery, but Cartech turns that intimidation into a manageable weekend project. This guide focuses specifically on the heavy hitters of the Ford world: the 8.8 and 9 inch differentials. Instead of wading through generic automotive theory, you get direct, actionable instructions on how to actually tear down and rebuild these specific units. It is the kind of resource that saves you from the nightmare of incorrect gear backlash or improperly set preload. Whether you are refreshing a daily driver or prepping a performance build, having a dedicated roadmap for these two specific axle types makes the difference between a smooth drivetrain and a costly mistake.

What We Like
8.8 inch focus
9 inch coverage
Rebuild instructions
Ford differential expertise

Chevy Silverado & GMC Sierra 1500 Pickups (14-16), 2500/3500, Suburban/Tahoe/Yukon & Escalade (15-16) Haynes Repair Manual (Does not include 14 ... SU...

Haynes Repair Manual for GM Trucks and SUVs

4.6 (154 ratings)
HAYNES 24068 8.00 X 1.00 X 11.00 Inches 1.51 Pounds

Reviews for HAYNES (PM Score)

9.6 PM Score
Buy on Amazon
  • affordable proucdts
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
five-star-books 8.71 No No No

DIY mechanics working on mid-2010s GM platforms absolutely require this Haynes manual to avoid costly dealership mistakes. Whether you are maintaining a Silverado, a Sierra, or a large SUV like a Tahoe or Escalade, having a dedicated roadmap for these specific engine configurations is a game changer. This guide is built for the hands-on owner who wants to tackle repairs without breaking the bank. It provides a practical, budget-friendly approach to vehicle maintenance that keeps your heavy-duty truck or family SUV in peak condition. While it is important to note that this specific edition excludes certain 2014 models and diesel engines, the level of detail for the covered gasoline models makes it an essential addition to any home garage toolkit.

What We Like
Affordable repair guidance
Covers GM trucks
SUV maintenance support
Practical DIY instructions

Ford Automatic Transmission Overhaul Haynes TECHBOOK

Haynes Ford Automatic Transmission Overhaul Techbook

4.6 (134 ratings)
HAYNES MANUALS N. AMERICA, INC. 10355 8.25 X 0.50 X 10.75 Inches 1.00 Pounds
  • Step-by-step procedures Linked to over 700 easy-to-follow photos and illustrations
  • Complete troubleshooting section helps identify specific problems
  • Written from hand-on experience based on a vehicle teardown and rebuild using commonly available tools
  • Tips give valuable short cuts to make the job easier and eliminate the need for special tools
  • 700 B/W photos
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Missouri_Goodwill_Industries 9.92 No No No

You are staring at a disassembled transmission on your garage floor, wondering if you actually have the right sequence to put it all back together. This Haynes Techbook acts as a seasoned mechanic standing right next to you, guiding you through a full vehicle teardown and rebuild. Unlike generic manuals, this guide is built on genuine hands-on experience and relies on tools you likely already have in your toolbox. The sheer volume of visual aid is what sets it apart. With over 700 black and white photos and illustrations, you aren't left guessing which part goes where. It even includes a dedicated troubleshooting section to help you pinpoint specific mechanical failures before you start turning wrenches, along with clever shortcuts to bypass the need for expensive specialty equipment.

What We Like
700 instructional photos
Step-by-step procedures
Troubleshooting guide
Common tool focus
Hands-on rebuild experience

How to Rebuild & Modify High-Performance Manual Transmissions (Workbench How to)

Cartech High-Performance Manual Transmission Rebuild Guide

4.6 (367 ratings)
CARTECH SA103 8.50 X 0.38 X 11.00 Inches 1.05 Pounds

Reviews for CARTECH (PM Score)

9.6 PM Score
Buy on Amazon
  • How to Build & Modify High-Performance Manual Transmissions Cartech Manual - Softcover
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68 Yes Yes Yes

The smell of gear oil and the tactile grit of a disassembled gearbox are the unspoken prerequisites for anyone picking up this Cartech manual. This softcover guide serves as a technical roadmap for enthusiasts looking to move beyond basic maintenance and into the realm of serious performance modification. Instead of surface-level advice, it dives straight into the mechanics of rebuilding and tuning manual transmissions to handle higher power loads. It is a specialized workbench resource that treats the reader like a serious mechanic rather than a casual hobbyist. Whether you are attempting to strengthen gear sets or optimize shift patterns, the level of detail provided makes it an essential addition to any performance shop library.

What We Like
Manual transmission focus
Performance modification guide
Workbench technical resource
Softcover format

Advanced Race Car Chassis Technology HP1562: Winning Chassis Design and Setup for Circle Track and Road Race Cars

HP Books Advanced Race Car Chassis Technology

4.5 (129 ratings)
HP BOOKS HP1562 8.54 X 0.32 X 10.87 Inches 0.99 Pounds

Reviews for HP BOOKS (PM Score)

9.5 PM Score
Buy on Amazon
  • AFFORDABLE PARTS
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68 Yes Yes Yes

Advanced Race Car Chassis Technology HP1562 delivers a masterclass in winning chassis design for both circle track and road race enthusiasts. This guide moves past the high-cost barrier often found in professional racing literature by emphasizing the use of affordable parts without sacrificing performance. I found the technical breakdown of setup procedures to be incredibly practical for anyone looking to fine-tune their vehicle's handling. Instead of focusing solely on theoretical physics, the text provides actionable insights that translate directly to the track. Whether you are building a dedicated circuit car or optimizing a local racer, this book offers a roadmap to competitive engineering that feels accessible rather than intimidating.

What We Like
Winning chassis design
Affordable parts focus
Circle track expertise
Road race setup
Technical racing guide

Jeep 4.0 Engines: How to Rebuild and Modify (Workbench How-to)

Cartech Jeep 4.0 Engine Rebuild and Modification Guide

4.5 (321 ratings)
CARTECH SA294 8.50 X 0.38 X 11.00 Inches 1.10 Pounds

Reviews for CARTECH (PM Score)

9.5 PM Score
Buy on Amazon
  • S-A Books Jeep 4.0 Engines How To Rebuild and Modify Book P/N 294
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68 Yes Yes Yes

Most DIY mechanics settle for basic repair manuals that only cover the bare essentials, but this Cartech guide dives much deeper into the actual soul of your powertrain. Instead of just telling you how to fix a leak, it walks you through the entire lifecycle of the legendary 4.0 engine, from a complete teardown to high-performance modifications. It serves as a technical roadmap for anyone looking to transform a standard daily driver into a rugged, custom-tuned beast. Whether you are performing a routine overhaul or seeking to squeeze more torque out of your setup, the level of detail provided makes the complex process of engine building feel approachable. It is a foundational resource for anyone serious about keeping these iconic engines running at peak performance.

What We Like
Engine rebuild instructions
Modification techniques
Technical workbench guide
Detailed engine tuning

Custom Auto Wiring & Electrical HP1545: OEM Electrical Systems, Premade & Custom Wiring Kits, & Car Audio Installations for Street Rods, Muscle Cars,...

HP Books Custom Auto Wiring and Electrical Guide

HP BOOKS HP-1545 8.50 X 0.41 X 10.80 Inches 1.19 Pounds

Reviews for HP BOOKS (PM Score)

5.6 PM Score
Buy on Amazon
  • Used Book in Good Condition
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68 Yes Yes Yes

Any serious automotive restorer or performance builder needs this manual on their workbench to avoid the nightmare of electrical shorts and failed ignitions. This HP Books guide serves as a technical roadmap for managing everything from OEM electrical systems to complex car audio installations. Whether you are wiring a vintage street rod, prepping a high-stakes race car, or tackling a heavy-duty truck restoration, the depth of information on premade and custom wiring kits is indispensable. Since this is a used book in good condition, you are getting a high-value technical resource without the premium price tag of a brand-new edition. It is a practical, hands-on tool for anyone serious about mastering vehicle circuitry and ensuring long-term reliability in their builds.

What We Like
Electrical system guide
Custom wiring instructions
Restoration technical resource
Car audio installation
Used good condition
Buying Guide

A Guide to Selecting the Best Automotive Engine Mechanics

A Guide to Selecting the Best Automotive Engine Mechanics

Defining Your Performance Goals

Before purchasing any mechanical improvement, you must categorize your objective. Are you seeking reliability improvements (reducing heat, improving lubrication, or strengthening gaskets) or performance improvements (increasing compression, airflow, or throttle response)? Attempting to increase power without first ensuring the mechanical foundation can handle the increased stress is a recipe for catastrophic engine failure. A logical progression typically starts with thermal management and cooling, followed by fuel/air delivery, and finally, internal rotating assembly upgrades.

Material Science and Durability

In the realm of engine mechanics, the material composition of a part is non-negotiable. When looking at components like camshafts, connecting rods, or valve springs, prioritize metallurgy. Forged steel components are significantly superior to cast components for high-stress applications because they offer higher tensile strength and better resistance to fatigue. If you are upgrading cooling components, look for high-grade aluminum alloys that offer superior thermal conductivity. Always consider the operating temperature of the part. A component that works well in a standard commuter car may fail in a high-performance or turbocharged environment due to thermal expansion or material softening.

Compatibility and Tolerance Specifications

Engine mechanics operate on incredibly tight tolerances, often measured in microns. An 'improvement' that does not adhere to strict OEM (Original Equipment Manufacturer) specifications or fails to account for the specific clearance requirements of your engine block is a liability. When selecting parts like timing kits or head gaskets, ensure they are engineered for your specific engine architecture. For example, a gasket designed for a naturally aspirated engine may not have the necessary reinforcement to withstand the cylinder pressures of a forced-induction setup. Always verify that any aftermarket mechanical part is compatible with your existing sensor arrays and electronic control units (ECUs), as mechanical changes often necessitate electronic recalibration.

The Impact of Airflow and Volumetric Efficiency

One of the most effective ways to improve an engine mechanically is to optimize its volumetric efficiency—the ability to move air in and out of the cylinders. When evaluating intake manifolds, throttle bodies, or exhaust headers, look for smooth internal geometries that minimize turbulence. Rough casting marks inside an intake runner can disrupt airflow, negating the benefits of the upgrade. Similarly, when selecting exhaust improvements, consider the backpressure characteristics. An exhaust that is too large for the engine's displacement can actually decrease low-end torque, even if it increases top-end horsepower.

Recommendation Logic: The Tiered Approach

To maximize your budget, we recommend a tiered implementation strategy. Tier 1: Maintenance-Based Improvements focus on high-quality filtration, premium cooling systems, and heavy-duty ignition components. Tier 2: Bolt-On Performance involves intake systems and exhaust upgrades that improve breathing. Tier 3: Internal Rebuilds are the most intensive, involving forged internals and upgraded valvetrains. Never skip to Tier 3 without ensuring your Tier 1 and Tier 2 foundations are rock solid.

Ready to choose?

Jump back to our ranked picks or compare the shortlist side by side.

Frequently Asked Questions

Quick answers about Automotive Engine Mechanics before you buy.

Professional grade kits feature high-torque capacity, drop-forged steel construction, and tighter tolerances to prevent slipping under heavy load, whereas DIY kits prioritize cost-savings and basic home maintenance tasks.

Yes. If you are using pneumatic or electric impact wrenches to remove stubborn bolts, you must use impact-rated sockets. Standard chrome sockets can shatter under the rapid vibration and force of an impact tool.

You should check for a calibration certificate included with the tool. For regular use, it is wise to verify accuracy periodically using a torque tester, as dropping a torque wrench can knock it out of specification.

If you perform most of your work on a lift or jack stands, a slim creeper is essential for ergonomic access to the undercarriage and prevents unnecessary back strain.

Metric uses the decimal-based system used by most modern vehicles (especially imports), while SAE uses fractional inches (common on older American cars). For modern engine work, a comprehensive metric set is the highest priority.

Always wipe tools down with a light film of machine oil after use, especially if working with fluids, and store them in a dry, temperature-controlled environment to prevent oxidation.

Digital wrenches offer higher precision and audible/visual alerts, making them superior for sensitive engine components, while click-style wrenches are more durable and easier to use for general heavy-duty tasks.

A high-quality set should include deep-well sockets, ratchets with various drive sizes, torque wrenches, feeler gauges, pliers, and specialized pullers for removing pulleys or gears.
Research & Insights

Our Analysis of Automotive Engine Mechanics

2,881 Reviews Analyzed
9 Products Evaluated
9.1 Avg PM Score
5 Brands Ranked

Top 10 Automotive Engine Mechanics Brands on Amazon

Share of top-ranked products by brand, from our editorial analysis.

  1. 01 Cartech 4 (44.4%)
  2. 02 Hp Books 2 (22.2%)
  3. 03 Cool Springs Press 1 (11.1%)
  4. 04 Haynes 1 (11.1%)
  5. 05 Haynes Manuals N. America, Inc. 1 (11.1%)

What Our Analysis Found

We've carried out a comprehensive analysis of 2,881 reviews on Automotive Engine Mechanics, using our selection criteria to identify the best options in the categories. Our findings reveal that most customers typically select Automotive Engine Mechanics priced around $28.85, with top brands including zishka publishing, cartech, pearson, haynes manuals n. america, inc., mcgraw-hill education, publications international, ltd., hp books and for dummies and peter pauper press.

Our team of expert editors reviewed these high-quality items and handpicked the top 17 Automotive Engine Mechanics for your consideration. We've also done extensive research on numerous sellers, identifying the best ones in the categories category — including amazon.com, amazon.com services llc, haynes repair manuals and superbookdeals- and goodvibes books.

We are dedicated to assisting our users in finding the right improvement Products based on their needs, saving them considerable time when choosing which Automotive Engine Mechanics to buy. We take pride in the number of satisfied users we've helped through our thorough and insightful reviews.

Side by Side

Comparison Table

Compare the top 17 picks at a glance — select a column to sort.

# Product Brand PM Score Rating Where to Buy
1 Peter Pauper Press Auto Log Book PETER PAUPER PRESS 9.7 4.5 (1,383) Buy on Amazon
2 Zishka Publishing Calculus-based Electricity and Magnetism Study Guide Zishka Publishing 9.7 4.7 (131) Buy on Amazon
3 Engineers' Practical Databook Technical Reference Guide 9.6 4.6 (742) Buy on Amazon
4 Zishka Publishing Calculus-Based Physics Study Guide Zishka Publishing 9.6 4.6 (241) Buy on Amazon
5 LS Series Engine Manual: Performance Modifications - Repair Haynes Manuals N. America, Inc. 9.4 4.4 (100) Buy on Amazon
6 How Car Engine Works?: internal combustion engine An under t 9.3 4.3 (108) Buy on Amazon
7 CAR BASICS PARTS & SYSTEMS: Learn how your car works, Intern 5.2 4.3 (18) Buy on Amazon
8 Principles of Automotive Engines (Mechanics and Hydraulics) 4.6 3.5 (21) Buy on Amazon
9 Small Engines and Outdoor Power Equipment by Cool Springs Press Cool Springs Press 9.7 4.5 (1,041) Buy on Amazon
10 Cartech Ford C4 and C6 Transmission Rebuild Guide Cartech 9.6 4.6 (414) Buy on Amazon
11 Cartech Guide to Rebuilding Ford Differentials Cartech 9.6 4.6 (290) Buy on Amazon
12 Haynes Repair Manual for GM Trucks and SUVs HAYNES 9.6 4.6 (154) Buy on Amazon
13 Haynes Ford Automatic Transmission Overhaul Techbook Haynes Manuals N. America, Inc. 9.6 4.6 (134) Buy on Amazon
14 Cartech High-Performance Manual Transmission Rebuild Guide Cartech 9.6 4.6 (367) Buy on Amazon
15 HP Books Advanced Race Car Chassis Technology HP Books 9.5 4.5 (129) Buy on Amazon
16 Cartech Jeep 4.0 Engine Rebuild and Modification Guide Cartech 9.5 4.5 (321) Buy on Amazon
17 HP Books Custom Auto Wiring and Electrical Guide HP Books 5.6 4.0 (31) Buy on Amazon