Air and Fuel› Fuel Injection Systems and Components - Electronic

PSI Conversion

Standalone EFI Wiring Harness

$579.99

SKU: HAR-G3WA

In Stock
In Stock
Ships by Jul 29
Free Shipping
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The PSI Conversion HAR-G3WA is a standalone electronic fuel injection wiring harness designed for 2003-2007 GM Gen III Vortec engines and 4L60E/4L80E transmissions. It features a plug-and-play design using factory-style GM Delphi connectors and high-temperature TXL wire for reliable engine and transmission operation in custom vehicle builds.

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

BrandPSI Conversion
Part NumberHAR-G3WA
CategoryAir and Fuel

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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