What are the symptoms of a bad ignition coil?

A failing ignition coil can cause several symptoms, including the “Check Engine Light” appears, engine misfires, difficulty starting the vehicle, reduced fuel economy and loss of power during acceleration.

How often should spark plugs be replaced?

Spark plug replacement intervals depend on the type of spark plug and the vehicle’s engine. Refer to your vehicle’s Owner’s Manual for more information.

How can I tell if my distributor cap and rotor need replacing?

Distributor caps and rotors typically need replacement when you notice engine misfires, difficult vehicle startup, reduced engine performance, corrosion or carbon tracking on the cap, or cracks or wear on the rotor.

What is the difference between glow plugs and spark plugs?

Glow plugs are used in diesel engines to preheat the combustion chamber for a cold start. Spark plugs are used in gasoline engines to ignite the air and fuel mixture.

Does the "Service Engine Soon" light tell me when my vehicle needs a tune-up?

No. The "Service Engine Soon" light comes on when the vehicle’s computer detects a minor malfunction, an engine emissions issue or that routine maintenance is needed. For more information, refer to your vehicle owner's manual.

Acdelco Professional D308r 12363081 Ignition Distributor Cap

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

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Description

⚡ Ignite your engine’s potential with precision and power!

TAILORED VEHICLE FIT - Designed specifically for your car or truck for hassle-free installation and optimal reliability.
EASY READ LOCATOR KEYS - Simplifies installation with clear alignment, saving you time and frustration.
ANTI ARC BARRIER SHIELD - Minimizes secondary voltage arcs to keep your engine firing flawlessly every time.
PRECISION METAL INSERTS - Ensures lightning-fast spark transfer for peak engine performance.
TRUSTED PROFESSIONAL GRADE - Backed by ACDelco’s 24-month unlimited mileage warranty for peace of mind on every drive.

The ACDelco Professional D308R Ignition Distributor Cap is a premium, vehicle-specific replacement part engineered with metal inserts for superior conductivity and a full anti-arc barrier to prevent misfires. Featuring easy-to-read locator keys for simple installation, it delivers reliable performance backed by a 24-month unlimited mileage warranty, making it the go-to choice for professional-grade ignition system upgrades.

Specifications

ASIN	B000C9N6AK
Automotive Fit Type	Vehicle Specific Fit
Best Sellers Rank	#96,672 in Automotive ( See Top 100 in Automotive ) #5 in Automotive Replacement Distributor Caps
Brand	ACDelco
Brand Name	ACDelco
Closure Type	Twist-On
Color	Black
Compatible with Vehicle Type	Car, Truck
Customer Reviews	4.6 out of 5 stars 116 Reviews
Exterior Finish	Painted
Global Trade Identification Number	00036666615623, 40036666615621
Included Components	ACDelco - Ignition Distri (B) (D308R)
Item Dimensions	5.4 x 4.5 x 4.3 inches
Item Type Name	ACDelco - Ignition Distri (B) (D308R)
Item Weight	6.4 ounces
Item dimensions L x W x H	5.4 x 4.5 x 4.3 inches
Manufacturer	ACDelco
Manufacturer Part Number	12363081
Manufacturer Warranty Description	24 Months / Unlimited Miles on parts sold on or after 04/01/18. (Parts Only) Please see ACDelco.com for more details.
Material	Metal
Material Type	Metal
Model Number	D308R
OEM Equivalent Part Number	12363081
Style Name	Professional,Simple
UPC	036666615623
Unit Count	1.0 Count
Vehicle Service Type	Car, Truck

Reviews

S**R

Great product

Great part

15.10.2025

D**E

Working good on my Buick

Works great for my Buick

5.07.2025

N**R

Just right

Replaced the original perfectly.

27.12.2025

R**N

Good Dist cap

5.05.2025

V**A

327 engine parts

Work great. I would deal with them again

30.11.2025

R**B

Correct AC Delco distributor cap

Correct AC Delco distributor cap for my 1973 corvette.

18.07.2024

T**C

just right!

quality product, as described

3.05.2024

C**W

Perfect fit for my '72 AMC Javelin

It works!

14.03.2024

W**Y

tres satisfait

9.09.2018

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Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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416 DH

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