Shopping Session Expired

Your shopping session appears to have timed out due to inactivity or you have completed an order and then attempted to use the back button.

If you clicked the finalize order button already, Please check your email for a receipt within the next 5 minutes before returning to our site and attempting to place a new order. You may accidentally place a duplicate order if you do not check first. If you would like to modify your order after placing it, please contact customer service.

Please return to our website and create a new cart or contact customer service to change a placed order.

About US

Looking for an Affordable, In Stock, Plug and Play wiring harness for your LS Swap? PSI sells Standalone Wiring Harnesses for GM Gen II, III, IV, & V LS/LT based engines and transmissions. These harnesses include the Gen II LT1/LT4, Gen III (24x) LS1/LS6 and Vortec Truck Engines as well as Gen IV (58x) LS2, LS3, LS7, & Vortec and GEN V LT / ECOTEC3 Engines. All PSI Harnesses are Made in the USA. In addition to wiring harnesses, PSI carries Holley Products, Vintage Air A/C, Dakota Digital Gauges, HPTuners and PCM programming, Fuel Pump Kits, Engine Sensors, Extension Harnesses, Replacement GM connector pigtails and a complete line of hardware to complete your conversion needs!

Contact Us

2029 Route 88
Brick, NJ 08724
ph. 732-444-3277
PSI
  • Paypal
  • Visa
  • Mastercard
  • American Express
  • Discover