where does one find a 3/8 inch spark plug socket socket? I can only find 5/8 inch and larger.

Unless these are somehow the tiniest spark plugs in existence, you do not need a 3/8” socket. 5/8” will be the correct socket size and 3/8” will be the size of the ratchet attachment on the other end of the socket. 3/8” is about 10 mm which is smaller than the threads on this plug.

will this fit 2004 dodge ram 1500 4.7 liter 4x4 v8?

No, these Autolite XP3923 spark plugs fit 2002-2005 Dodge Ram 1500 (3.7L). Autolite XP5224 will fit 2002-2007 Dodge Ram 1500 (4.7L V8).

Will these spark plugs fit 2003 Altima 2.5

Hello, no these will not fit a Altima. Ngk are the original part number 6240. Please let us know if we can be of further assistance.

Where are these made?

Autolite Iridium XP spark plugs are designed and engineered in the USA. However, they are manufactured in China - as are all Autolite spark plugs.

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

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XP XTREME PERFORMANCE� SPARK P

Product ID: 399799888

Details

Automotive Fit Type
Vehicle Fit
Brand
Autolite Ultra
Global Trade Identification Number
Top Material Type
Alloy Steel
UPC
009100044334

🔥Iridium Ultra for superior spark

⚙️Vehicle-specific fit for precision

🇺🇸Proudly made in the USA

Description

⚡ Ignite your drive with precision and power!

MADE IN THE USA - Crafted domestically with premium materials for unmatched quality and consistency.
TRUSTED BY THOUSANDS - Rated 4.6/5 by over 2,300+ drivers who demand top-tier ignition performance.
PRECISION ENGINEERED FIT - Custom vehicle-specific design ensures flawless installation and peak performance.
IRIDIUM ULTRA SPARK TECHNOLOGY - Delivers a hotter, more reliable spark for enhanced engine efficiency and power.
DURABLE ALLOY STEEL CONSTRUCTION - Built to withstand extreme conditions, extending spark plug life and reliability.

The Autolite Iridium Ultra XP XTREME PERFORMANCE SPARK P XP3923 spark plug offers a vehicle-specific fit with advanced iridium technology, ensuring superior ignition, durability, and efficiency. Made in the USA and highly rated by thousands, it’s engineered for drivers who demand peak engine performance and reliability.

Specifications

ASIN	B009J58FJA
Automotive Fit Type	Vehicle Specific Fit
Brand	Autolite Iridium Ultra
Brand Name	Autolite Iridium Ultra
Country of Origin	USA
Customer Reviews	4.6 out of 5 stars 2,356 Reviews
Global Trade Identification Number	00009100044334
Manufacturer	Autolite
Manufacturer Part Number	XP3923-4PK
Model	XP3923-4PK
Top Material Type	Alloy Steel
UPC	009100044334

Reviews

H**E

Good deal

16.11.2024

R**T

the right plug

26.11.2023

K**D

مناسبة لMG ZS 2019 1.5

ممتازة جدًا ومجربها على عدة سيارات وبعضها مشيت عليها ممشى يتجاوز الثمانين الف بدون مشاكل

1.02.2026

D**R

Reliable spark plugs that perform well and last

28.01.2026

C**N

Ta bien

Son bujias, y me llegaron bien

6.09.2023

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