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.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 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	#1,344,953 in Automotive ( See Top 100 in Automotive ) #6,482 in Automotive Replacement Spark Plugs
Brand	Autolite Iridium Ultra
Brand Name	Autolite Iridium Ultra
Compatible with Vehicle Type	Car, Truck
Core Material	Platinum
Customer Reviews	4.6 out of 5 stars 56 Reviews
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
UPC	009100260130
Unit Count	1 Count
Vehicle Service Type	Car, Truck

Reviews

G**G

Spark!

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

11.05.2026

S**A

Quality

Good quality

19.12.2025

M**U

Dependability

Fit well no problem would buy again

27.04.2025

W**.

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

R**G

Nice plugs, works like they should

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

26.03.2018

W**Y

Very happy

Came quick and works perfect

17.02.2021

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