Best Ignition Distributor Cap Adapters in 2026

Daisy
Last Updated: Feb 7, 2026

At a Glance: Our Top Picks for Ignition Distributor Cap Adapters

ACDelco GM Original Equipment D329A Ignition Distributor Cap , Black
#TOP1
Acdelco Gm Original Equipment D329A Ignition Distributor Cap
9.8
PM SCORE
ACDelco GM Original Equipment D328A Ignition Distributor Cap , Black
#TOP2
Acdelco Gm Original Equipment D328A Ignition Distributor Cap
9.8
PM SCORE
ACDelco C349 Professional Ignition Distributor Cap
#TOP3
Acdelco C349 Professional Ignition Distributor Cap
9.7
PM SCORE

* PickSmartly editors independently research, review, and endorse the top products through comprehensive data analysis. We may earn a commission for qualifying purchases made through our product links.

Summary of the Best Ignition Distributor Cap Adapters of 2026

Acdelco Gm Original Equipment D329A Ignition Distributor Cap , Black

ACDELCO
D329A
8.00 X 4.60 X 2.20 Inches
0.20 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

have metal inserts designed to provide the best possible fit to ensure maximum conductivity between the distributor towers and spark plug wires

easy-to-read locator keys on caps make proper installation simple

equipped with a full anti-arc barrier to reduce the possibility of secondary voltage arcs that can cause an engine to misfire

Fit type: Vehicle Specific

Acdelco Gm Original Equipment D328A Ignition Distributor Cap , Black

ACDELCO
D328A
8.00 X 4.60 X 2.20 Inches
0.23 pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

Have metal inserts designed to provide the best possible fit to ensure maximum conductivity between the distributor towers and spark plug wires

Easy-to-read locator keys on caps make proper installation simple

Equipped with a full anti-arc barrier to reduce the possibility of secondary voltage arcs that can cause an engine to misfire

GM-recommended replacement part for your GM vehicle’s original factory component

Offering the quality, reliability, and durability of GM OE

Acdelco C349 Professional Ignition Distributor Cap

ACDELCO
C349
5.20 X 5.20 X 4.40 Inches
0.35 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

leading manufacturer of high-quality products

international renown for our diverse range of award-winning products

fully equipped with state-of-the-art technology

all products have been designed with the professional in mind

constantly modernizing our powerful devices to meet the demands of the modern user

Fit type: Vehicle Specific

Acdelco Gm Original Equipment D303A Ignition Distributor Cap , Black

ACDELCO
D303A
6.70 X 5.70 X 4.20 Inches
0.50 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

Have metal inserts designed to provide the best possible fit to ensure maximum conductivity between the distributor towers and spark plug wires

Easy-to-read locator keys on caps make proper installation simple

Equipped with a full anti-arc barrier to reduce the possibility of secondary voltage arcs that can cause an engine to misfire

GM-recommended replacement part for your GM vehicle’s original factory component

Offering the quality, reliability, and durability of GM OE

Acdelco Professional D336X Ignition Distributor Cap , Black

ACDELCO
D336X
4.50 X 5.60 X 6.60 Inches
0.75 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

Professional, premium aftermarket replacement

Provides the performance and dependability you expect from ACDelco

Manufactured to meet expectations for fit, form, and function

Acdelco Professional D338X Ignition Distributor Cap , Black

ACDELCO
D338X
6.50 X 4.20 X 6.50 Inches
0.70 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

have metal inserts designed to provide the best possible fit to ensure maximum conductivity between the distributor towers and spark plug wires

easy-to-read locator keys on caps make proper installation simple

equipped with a full anti-arc barrier to reduce the possibility of secondary voltage arcs that can cause an engine to misfire

Fit type: Vehicle Specific

Standard Motor Products Fd-166 Distributor Cap Adapter

STANDARD MOTOR PRODUCTS
FD-166
6.50 X 2.50 X 6.56 Inches
0.28 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

Product Type :Auto Part

Package Dimensions :17.526 Cm L X17.272 Cm W X6.604 Cm H

Country Of Origin :China

Package Weight :2.052Lbs

Dragon Fire Performance Ignition Distributor Cap & Cap Adapter Compatible With 1978-1996 Ford F-150 Efi 5.0L 5.8L 6.6L 6.9L 7.5L V8 Replaces Fd168 Fd166 Fd307 Oem Fit Cap1045-R

AIP ELECTRONICS
CAP1045-R
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
AIP Electronics 9.54

Features

MANUFACTURER: DRAGON FIRE PERFORMANCE

Compatible with 1978-1996 Ford EFI 5.0L 5.8L 6.6L 6.9L 7.5L V8 *Be Sure to Check for Correct Fitment Using the Chart Above. Don't See a Chart? Message us for help.

FEATURES OE Factory Fit, designed with performance and reliability in mind. precision molded thermoplastic cap resists fracturing and cracking from the constant heat cycling, all connections are watertight and weatherproof, tested and ensured to match OE fit, only premium grade materials used for a long service life. Comes exactly as pictured.

DIRECT Factory Fit and Ready for Installation Straight Out of The Box

EASY DIY Plug and Play Install. Perfect for any professional or weekend mechanic.

Top 10 ignition distributor cap adapters Brands on Amazon

Here is the list of top-rated brands that were evaluated by PM.

Brand Count
Acdelco 6
Aip Electronics 1
Standard Motor Products 1

Top 10 ignition distributor cap adapters Brands Pie Chart


We've carried out a comprehensive analysis of 3,921 reviews on ignition distributor cap adapters, using our selection criteria to identify the best options in the categories. Our findings reveal that most customers typically select ignition distributor cap adapters priced around $25.56, with top brands including and

Our team of expert editors reviewed these high-quality items and handpicked the top 8 ignition distributor cap adapters for your consideration. We've also done extensive research on numerous sellers, identifying the best ones in the categories category. These include and .

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