9 out of 10 based on 242 ratings. 3,199 user reviews.


PSI specializes in the design and manufacture of 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.
CPW - currentperformance
** These Harnesses are made to order please allow 6 weeks for order to ship** Note: VATS bypass module is not needed if VATS has been disabled via tune in the PCM. Built From Scratch Stand Alone Engine Harness. An engine management harness is pretty much what you will find from most wiring harness companies.
1994-1997 LT1 PSI STANDALONE WIRING HARNESS W/T56 or Non Vortec w/4L60E/4L80E 1997-2004 LS1/LS6 PSI STANDALONE WIRING HARNESS W/4L60E 1994 LT1 F-Body Plug and Play 24x Conversion Harness with 1997-2006 DBC LS1 Standalone Harness with T56 or Non Video: Do-It-Yourself LS Cylinder Head Porting Series 1995 LT1 F-Body Plug and Play 24x Conversion Harness with 1997-2002 LS1/LSX PSI STANDALONE WIRING HARNESS W/T56 or Lt1 Wiring Harness Diagram Fresh Ls Standalone Wiring Lt1 Wiring Harness Diagram Fresh Ls Standalone Wiring 5 3 Wiring Harness Standalone Within Diagram Wiring And Lt1 Wiring Harness Diagram Fresh Ls Standalone Wiring Lt1 Wiring Harness Diagram Fresh Ls Standalone Wiring Lt1 Wiring Harness Diagram Fresh Ls Standalone Wiring 2007-2014 Gen IV LS3 Based 4.8, 5.3, 6.0, 6.2 4L80e LS3 Lt1 Wiring Harness Diagram Fresh Ls Standalone Wiring 03-07 LS VORTEC STANDALONE WIRING HARNESS DRIVEBYWIRE W Drive By Wire Vortec T56 Non Electric Stand Alone LS Swap LS1, 5.3L / 6.0L / 4.8L Engine Wiring Harness & PCM Stand Lt1 Wiring Harness Diagram Fresh Ls Standalone Wiring Lt1 Wiring Harness Diagram Fresh Ls Standalone Wiring 23 best Standalone Wiring Harnesses images on Pinterest Lt1 Wiring Harness Diagram Fresh Ls Standalone Wiring [WRG-7488] 96 Lt1 Spark Plug Wire Diagram PSI Conversion Announces Gen-V LT1 Standalone Wiring LSA 1997-2004 LS1/LS6 PSI STANDALONE WIRING HARNESS W/4L60E Lt1 Wiring Harness Diagram Fresh Ls Standalone Wiring C&D LT1 (Gen V) 1997-2006 DBC LS1 Standalone Harness with 4L60e Transmission 1000+ images about Engine Harness and Wiring on Pinterest 2006-2007 24X GEN IV LS2 6.0 PSI STANDALONE WIRING HARNESS LS Gen3 24x Standalone Harness LS1, 5.3L / 6.0L / 4.8L Engine Wiring Harness & PCM Stand 1999-2006 DBC 4.8 5.3 6.0 VORTEC STANDALONE WIRING HARNESS GM EFI Magazine Wiring Harness from Performance Systems Integration PSI 1997-2006 DBC LS1 Standalone Harness with T56 or Non Amazon.com: Mophorn Wire Harness 1997-2002 LS1/LSX Vortec 1000+ images about Standalone Wiring Harnesses on 17 Best images about LSX & LT1 Conversion Parts on 20 best images about LS Engine Swap on Pinterest Free Shipping on Orders Over $199

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