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PSI Conversion Performance Parts 

LS/LT Swap Harnesses and More...

732-276-8589

Due to Demand and Production Time, Orders will take longer to Ship

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. PSI LS Swap harnesses that are in stock ship in 1-3 business days!

Due to COVID-19/ pandemic restrictions, and supply chain issues, some harnesses may experience an extended shipping lead time. Contact us directly for current shipping time estimates on a specific harness if needed. Due to demand and supply chain issues, we are experiencing longer lead times; Please contact for exact ETA as needed.

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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#.

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LSX Guide

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

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