PSI PSICONVERSION HOTROD HOT ROD MAGAZNE CARCRAFT

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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Highway 15 Nostalgia Universal Wiring System

$1,419.00
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Power Plus 13 Universal Wiring System

$319.00
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Builder 19 Universal Wiring System

$479.00
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Power Plus 20 Universal Wiring System

$339.00
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Severe Duty Universal Wiring System

$709.00
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Route 9 Universal Wiring System

$299.00
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Highway 22 Plus Universal Wiring System

$529.00
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Highway 15 Plus Universal Wiring System

$449.00
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03 - '07 Vortec (DBW) w/ 4L60E or 4L80E w/ 5 pin MAF Standalone Harness

$579.00
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99 - '06 Vortec (DBC) W/ 4L60e Or 4L80e W/ Multec Injectors & 5 Pin Maf Standalone Harness

$549.00
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Gen IV Engine (58x) w/ T56/TR6060 Non VVT Standalone Harness

$569.00
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08 - '15 LS3 (6.2l) W/ 4l60e Or 4l80e Standalone Harness

$659.00
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08 - '14 LS3 (6.2l) W/ 6l80e Standalone Harness

$719.00
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10 - '14 L99 (6.2L) w/ 6L80E Standalone Harness

$719.00
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‘97 - ‘04 LS1 LS6 & '99 - '06 Vortec (DBC) w/ 4L60E or 4L80E w/ EV1 Injectors & 5 pin MAF Standalone Harness

$549.00

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!

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PSI Conversion Performance Parts
LS/LT Swap Harnesses and More...
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