What size socket do these take?

The Hex Size for Autolite APP45 is 13/16in or 21mm.

Autolite App45 Double Platinum Automotive Replacement Spark Plugs 4 Pack

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

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Description

⚡ Ignite your drive with Autolite’s double platinum power!

HEAT MASTERY - Yttrium-enhanced ground electrode ensures superior heat transfer, keeping your engine cooler under pressure.
ENDURING PLATINUM POWER - Platinum-to-platinum firing design drastically reduces gap erosion and misfires for long-lasting reliability.
LIGHTNING FAST IGNITION - Necked-down center electrode fires quicker with less voltage for effortless starts and rapid acceleration.
TRUSTED LEGACY SINCE 1936 - Autolite’s decades of expertise deliver OE-quality replacement plugs that professionals rely on.
PRECISION ENGINEERED LONGEVITY - High nickel alloy side electrode maintains exact gap, guaranteeing extended spark plug life and consistent performance.

Autolite APP45 Double Platinum Spark Plugs feature a necked-down center electrode and platinum-to-platinum firing design for faster, cleaner ignition and superior durability. Enhanced with a Yttrium ground electrode and high nickel alloy side electrode, these plugs maintain precise gaps and improve heat transfer, ensuring longer life and reliable performance. Backed by a trusted brand since 1936 and a 5-year limited warranty, they’re engineered for vehicle-specific fit and optimal acceleration.

Specifications

Asin	B001P2JNWS
Automotive Fit Type	Vehicle Specific Fit
Best Sellers Rank	#1,449,122 in Automotive (See Top 100 in Automotive) #7,238 in Automotive Replacement Spark Plugs
Brand Name	Autolite Iridium Ultra
Compatible With Vehicle Type	Car, Truck
Core Material	Platinum
Customer Reviews	4.6 4.6 out of 5 stars (56) 4.6 out of 5 stars
Global Trade Identification Number	00009100260130
Included Components	Platinum Spark Plug
Item Highlight	Replaces 7510. Platinum on both electrodes for distributorless systems. Steady gap, 60,000-80,000 mile life.
Item Type Name	Double Platinum Spark Plug
Item Weight	8 ounces
Manufacturer	FRAM
Manufacturer Part Number	APP45-4PK
Manufacturer Warranty Description	Manufacturer
Model Number	APP45-4PK
Number Of Items	4
Oem Equivalent Part Number	APP45-4PK
Thread Size	14mm
Top Material Type	Nickel
Unit Count	1 Count
Upc	009100260130

Reviews

User

Spark!

These spark plugs have worked out great as original equipment on the restoration of my 1967 Mustang Fastback 390.

11.05.2026

User

Quality

Good quality

19.12.2025

User

Dependability

Fit well no problem would buy again

27.04.2025

User

Great product at a great price!

I've used the same plugs in the past and have been very satisfied. The sellers price is considerably less than everyone else...

1.02.2023

User

Nice plugs, works like they should

nice plugs, but be sure to check the gap before you install

26.03.2018

User

Very happy

Came quick and works perfect

17.02.2021

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Autolite APP45 Double Platinum Automotive Replacement Spark Plugs (4 Pack)

Details

Details

Description

Specifications

Reviews

Common Questions