Best Engine Main Bolts in 2026

ARP balancer bolt kits will ensure that your balancer is locked into position.?

Part number: 2342503

Fit type: Vehicle Specific

Black color powder-coated anodized finish

Made with 6061 T6-grade high quality solid billet aluminum

Perfect for front/rear license plate mount, fenders, bumpers, wheelbases and inside engine-bay dress-up

👍 High Strength Grade 10.9 metric flange bolts

👍 Metric flange bolts with transparent zinc coating to prevent rust and corrosion

👍 Good quality preventing threads from seizing

【Fitment】: The engine stand bolt compatible with all Chevrolet Gen 1 & 2 Small Block Engines 265 283 305 307 327 350 366 383 400.

【High Quality】: High strength grade 10.9 metric flange bolts with clear zinc coated to prevent rust and corrosion.

【Feature】: No washers needed with these flanged headed bolts.

10 inner Main Bolts Replaces OEM 12560272

10 Outer main bolts for windage tray Replaces OEM 12560273

10 Main cap Side Bolts Replaces OEM 12556127

Package Dimensions: 10 L x 1.75 H x 6 W (inches)

Package Weight : 1.05 pounds

Country of Origin : United States

Package Dimensions: 5.842 H x 22.098 L x 10.668 W (centimeters)

Made in USA

Main Stud/Bolt Kit

Package Dimensions: 10 L x 1.25 H x 6 W (inches)

Package Weight : 0.49 pounds

Country of Origin : United States

Increased Reliability

SB Chevy SS 12pt Accessory Kit

Part number: 5349501

Package Weight: 3.3 pounds

ARP Main Bolt Kit 2 Bolt Main Ford Modular P/N 156-5201

Package Dimensions: 1.27 H x 25.146 L x 14.732 W (centimeters)

Package Weight: 1.0 pounds

FIT:For GM LS1 & LS6 3-Bolt Throttle by Cable Engines;98-02 Camaro, Firebird, Trans Am & 04 GTO.

FUNCTION:Include most external engine fasteners, except the accessory bolts.

ADVANTAGES:Socket head bolt kits are easy to install, more durable and corrosion resistant than OEM, and look exceptional to boot!

Package Dimensions: 5.842 H x 21.843 L x 10.668 W (centimeters)

Made in USA

Main Stud/Bolt Kit

Main studs are designed to meet the exacting standards and demands of professional engine builders

Manufactured from 8740 chrome moly steel

Rated at 200,000 PSI, which is considerably stronger than Grade 8 hardware

ARP Main Stud Kit Hex Nuts 4-Bolt Mains Small Block Chevy P/N 234-5801

Part number: ARP-234-5801

Fit type: Vehicle Specific

Grade 12.9 Rated to 1220 MPa

Replace Lost or Misplaced Main Cap Side Bolts

12 Point Black Oxide to match other Ferric Performance Bolt Kits

Product Type:Bolts

Item Package Dimension:6.0 " L X0.5 " W X0.5 " H

Item Paackage Weight:0.27 lbs

【Compatibility】For GY6 50cc 70cc 90cc 110cc 125cc 150cc Scooters ATVs Go Karts Moped Quad 4 Wheeler Dune Buggy Sandrail Taotao Sunl Coolster Jonway Roketa

【Size for reference】 Exhaust Studs: 32mm/1.26inch Long, 5.8mm/0.22inch Thread ( M6. M6 - 1.0 x 32mm )

【Meterial】 304 Stainless steel is corrosion resistant, durable, and well-suited for Corrotion, No more Broken Exhaust Studs / Bolts

287 Main Cap Fastener

Speedmaster creates unique & distinctive DNA items inspired by the blend of old and new technology. Its empowered work forced drives innovation not only in the products it sells but with the way it goes about doing it.

TRACK PROVEN - Surviving the longevity of road, race and recreation is mandatory for all "Track Proven" products, Bringing you closer to product perfection.

Direct replacement - this battery terminal bolt matches the fit and function of the factory part on specified years, makes and models

Ideal solution - this bolt is a reliable replacement for an original part that is missing or has failed due to fatigue

Durable construction - this part is made from quality materials to ensure reliable performance and long service life

High Strength Grade 10.9 metric flange bolts

The engine stand bolt is compatible with all Chevrolet Gen 1 & 2 Small Block Engines 265 283 305 307 327 350 366 383 400

Metric flange bolts with transparent zinc coating to prevent rust and corrosion

Fitment: Please check Amazon Fitment Filter and Description to see if this item will work on your vehicle before purchase!

Note: If your vehicle is registered in CA or NY,DO NOT BUY This item

Type: 287 Main Cap Fastener

Quality Material:This M10x1.25 stud kit is made of high hardness 304 stainless steel material, wear-resistant,durable for long time use.

Professional Manufacturing:The M10x1.25 turbo studs kit adopts professional manufacturing process, with stable performance, high precision and good reliability. Timely replacement of old or damaged turbo flange studs for better performance.

Simple Installation:Easy to install, and remove with the help of tool, no complicated procedure needed,direct replacement for old or broken parts.

Fitment: Please check Amazon Fitment Filter and Description to see if this item will work on your vehicle before purchase!

Note: If your vehicle is registered in CA or NY,DO NOT BUY This item

Type: 287 Main Cap Fastener

ARP LS Cam Bolt Kit 134-1003

These are perfect when upgrading your single bolt cam to an aftermarket 3 bolt camshaft and timing chain gear.

4.8 5.3 5.7 6.0 LS1 LS2 LS3 LS6 L99 LS4 LS9 LSA LQ4

208-5402 Main Stud kit (NOT Head Studs) for Honda Civic, CRX, Del Sol B16A B16A2, B16A3, B16

This kit is for bolting down the crankshaft main caps on 1.6L DOHC VTEC engines. This kit is NOT for bolting on the cylinder head.

Alternate Part Number: 208-5402

Main studs are designed to meet the exacting standards and demands of professional engine builders

Manufactured from 8740 chrome moly steel

Rated at 200,000 PSI, which is considerably stronger than Grade 8 hardware

ARP Compatible With VW/Au-di 2.0L (FSI) 4cyl Main Stud Kit

Part Number: 204-5408

Made from the highest quality materials.

Product 1: Lubricate the both sides of the washers with ARP ultra-Torque Fastener Assembly Lubricant then place them over the studs onto the cylinder head spot faces.

Product 2: Country of origin : United States

Product 2: Package Dimensions : 5" L x 2.5" W x 2.5" H