My Cart

Customers also purchased

Subtotal
$0.00

Our Phone Number has changed

DIAL 732-276-8589

PSI Conversion Performance Parts 

LS Swap Harnesses and More

Why PSI

A PSI Harness is made with top quality material right here in the USA. Our customer service is second to none and can be reached by phone five days a week and emailed 24 hours a day. We have a combined 25+ years experience. Don't wait 4 to 5 weeks for your harness to ship. PSI LS Swap harnesses are always in stock and usually ship in 1-3 business days!

Due to COVID-19/ pandemic restrictions, some harnesses may experience an extended shipping lead time. Contact us directly for current shipping time estimates on a specific harness if needed

Learn More...

LTX Gen V Guide

Trying to figure out what LT engine you have? Check the PSI VIN Decoder to decipher your engine information by VIN#.

Learn More...

LSX Guide

Trying to figure out what LS engine you have? Check the PSI VIN Decoder to decipher your engine information by VIN#.

Learn More...

Subscribe

Sign up to get the latest on sales, new releases and more …