Ignitions and Electrical› Ignition Components

Autolite

LASER IRIDIUM FINEWIRE SPARK PLUG

$11.44

SKU: A035 AI3923

In Stock
In Stock
Ships by Aug 5
Free Shipping over $100
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Description

LASER IRIDIUM FINEWIRE SPARK PLUG

MIA's Description

The Autolite AI3923 is a spark plug designed for optimal performance. It features a control electrode gap, interference suppression, and a single earthed electrode with a gasket seat. Key specifications include a 1.1mm electrode gap, a 16mm spanner size, and a 14mm external thread with a 1.25mm pitch.

This spark plug is built with a 19mm thread length and a 3.40mm spark position. It utilizes an SAE connector type and incorporates a 5 kOhm resistor. The Autolite AI3923 has a heat range of 10, with recommended torque specifications of 16-29 lb. ft. for cast iron and 15-22 lb. ft. for aluminum.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandAutolite
Part NumberA035 AI3923

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy