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Ignitions and Electrical› Wiring Harnesses

Holley

HOLLEY BTO SPEARTECH LT4-10L90-2

$4,957.95 $4,406.95 Save $551.00

SKU: H00E STE-LT4-10L90-2

In Stock
In Stock
Ships by Jun 9
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Advanced — 4+ hours

Description

This is a standalone wiring harness for retrofitting 2017-2021 Gen V LT4 SUPERCHARGED engines with a 10L90E automatic transmission into older muscle cars, street rods, or newer non-emissions controlled vehicles.

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

BrandHolley
Part NumberH00E STE-LT4-10L90-2

Videos

How to LT4 swap a C10!

How to LT4 swap a C10!
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Speartech Gen 5 V8 LT4 8L90 Standalone Swap Harness Preview
The LT4/10speed 1993 Chevy truck build is almost finished! We're on the home stretch!

The LT4/10speed 1993 Chevy truck build is almost finished! We're on the home stretch!
Swap a Gen V LT Engine into Your Car with Holley Terminator X EFI

Swap a Gen V LT Engine into Your Car with Holley Terminator X EFI

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.

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