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Performance Systems Integration

PSI (Performance Systems Intergration) - Improve Electrical Efficiency

Founded to address the growing demand for precision-engineered wiring systems, PSI has become a trusted source for enthusiasts and professionals alike. The company is committed to enhancing vehicle performance and reliability through its innovative products, which are designed to simplify installation and improve electrical efficiency. PSI offers a wide range of custom wiring harnesses tailored for various engine types and configurations, including LS swaps and other performance engine setups. These harnesses are designed for easy installation and optimal performance. Shop our favorite PSI products here at CPP!

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  1. PSI Vortec w/ 4L60E Standalone Wiring Harness

    Vortec with 4L60E with EV6 Injectors

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    In Stock
    Part # HAR-1030
    0%
    $579.00
  2. PSI Gen IV Engine w/ 6L80E Standalone Wiring Harness

    2006-Present 58x Engines with 6L80 or 6L90E

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    In Stock
    Part # HAR-1086
    0%
    $719.00
  3. PSI Standalone Wiring Harness w/ 4L60E

    4L60E

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    In Stock
    Part # HAR-1016
    0%
    $599.00
  4. PSI DBW T56 Standalone Wiring Harness

    2002 Vortec T56, DBW

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    In Stock
    Part # HAR-1085
    0%
    $599.00
  5. PSI DBW w/ T56/TR6060 Wiring Harness

    2010-2013 T56/TR6060

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    In Stock
    Part # HAR-1067
    0%
    $569.00
  6. PSI Conversion LS Wiring Harness for 2009-2015 LS 58X with 6L80E or 6L90E

    2009-2015 LS 58X with 6L80E or 6L90E

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    In Stock
    Part # HAR-1098
    0%
    $819.00
  7. PSI Vortec w/ 6L80E Auto Transmission Wiring Harness

    2006-2013 LS7 Vortec with 6L80E Auto Transmission

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    In Stock
    Part # HAR-1070
    0%
    $719.00
  8. PSI Wiring Harness w/ 4L60E

    2010-2013 L99 with 4L60E

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    In Stock
    Part # HAR-1068
    0%
    $659.00
  9. PSI Gen IV Oxygen Sensor Extension Wire Harness

    4-Wire, Triangle, Gray

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    In Stock
    Part # HAR-1034
    0%
    $19.00
  10. PSI Conversion LS Wiring Harness for 2005-2006 GM LS2 with 4L60E

    2005-2006 GM LS2 with 4L60E

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    In Stock
    Part # HAR-1094
    0%
    $664.00
  11. PSI Vortec DBW w/ 4L60E Standalone Wiring Harness w/ LS1 Injectors

    1999-2006 Vortec Chevy, GMC, Cadillac and Hummer Truck Engines with 4L60E with LS1 Injectors

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    In Stock
    Part # HAR-1090
    0%
    $549.00
  12. PSI Auto Trans L76 Wiring Harness w/ 6L80E

    2008-2009 L76 with 6L80E

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    In Stock
    Part # HAR-1075
    0%
    $719.00
  13. PSI Gen IV Wire Harness w/ 4L60E Auto Transmission

    2008-2009 L76 with 4L60E

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    In Stock
    Part # HAR-1046
    0%
    $659.00
  14. PSI Gen IV Manual Standalone Wiring Harness w/ T56/TR6060

    2008-2013 LS3 Manual Transmission with T56/TR6060

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    In Stock
    Part # HAR-1037
    0%
    $569.00
  15. PSI DBW LS2 58X w/ 4L60E Wiring Harness

    2005-2007 LS2 58x with 4L60E

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    In Stock
    Part # HAR-1064
    0%
    $659.00
  16. PSI Wiring Harness LH6 w/ 6L80E w/ EV6 Injectors

    2005-2014 LH6 with 6L80E with EV6 Injectors

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    In Stock
    Part # HAR-1058
    0%
    $589.00
  17. PSI Gen IV Standalone Wiring Harness w/ 4L60E

    2008-2013 LS3 with 4L60E

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    In Stock
    Part # HAR-1038
    0%
    $659.00
  18. PSI Vortec DBW w/ 4L60E Standalone Wiring Harness

    2003-2007 Chevy & GMC Vortec with 4L60E, DBW

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    In Stock
    Part # HAR-1014
    0%
    $579.00
  19. PSI Gen IV Auto Transmission Wiring Harness 4L60E

    Auto Transmission with 4L60E

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    In Stock
    Part # HAR-1036
    0%
    $659.00
  20. PSI T56/TR6060 Manual Transmission Wiring Harness

    T56 or TR6060 Manual Transmission

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    In Stock
    Part # HAR-1065
    0%
    $569.00
  21. PSI DBC LT1/LT4 w/ T56 Standalone Wiring Harness

    1994-1995 Vortec LT1 or LT4 with T56

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    In Stock
    Part # HAR-1006
    0%
    $519.00
  22. PSI 58X Automatic Transmission Wiring Harness w/ 6L80E

    2006-2007 LS2 6.0L 58x Automatic Transmission with 6L80E

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    In Stock
    Part # HAR-1077
    0%
    $719.00
  23. PSI Vortec DBW w/ 4L60E / 4L80E Standalone Wiring Harness

    5-Pin (A/C)

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    In Stock
    Part # HAR-1084
    0%
    $614.00
  24. PSI DBC LS1 w/ T56 Standalone Wiring Harness

    1997-2002 LS1 with T56

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    In Stock
    Part # HAR-1013
    0%
    $549.00
  25. PSI DBC Wire Harness Auto Trans 4L60 Delphi

    1999-2003 Vortec Automatic Transmission 4L60 Delphi

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    In Stock
    Part # HAR-1018
    0%
    $549.00
  26. PSI Vortec Tac Module Harness

    Vortec

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    In Stock
    Part # HAR-1025
    0%
    $45.00
  27. PSI DBC LS1 w/ 4L60E Standalone Wiring Harness

    1997-2002 LS1 with 4L60E

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    In Stock
    Part # HAR-1012
    0%
    $549.00
  28. PSI Vortec DBW w/ 4L80E Standalone Wiring Harness

    2003-2007 Vortec with 4L80E, DBW

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    In Stock
    Part # HAR-1014-UG
    0%
    $579.00
  29. PSI Vortec DBC w/ 4L80E Standalone Wire Harness

    1991-2003 Vortec with 4L80E with Electronic Auto Transmission

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    In Stock
    Part # HAR-1018-UG
    0%
    $549.00
  30. PSI Auto Trans Wiring Harness w/ 6L80E for 2008-2013 LS3 6.2L Automatic Transmission with 6L80E

    2008-2013 LS3 6.2L Automatic Transmission with 6L80E

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    In Stock
    Part # HAR-1071
    0%
    $719.00
  31. PSI 58X w/ 4L60E Wiring Harness DBW

    2008 LS2 6.0L 58x with 4L60E

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    In Stock
    Part # HAR-1066
    0%
    $659.00
  32. PSI Vortec w/ T56 Standalone Wiring Harness w/ LS1 Injectors

    1999-2006 Vortec Chevy, GMC, Cadillac and Hummer Truck Engines with T56 with LS1 Injectors

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    In Stock
    Part # HAR-1091
    0%
    $549.00
  33. PSI Vortec T56/TR6060 Standalone Wiring Harness

    2007-2008 Vortec T56/TR6060

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    In Stock
    Part # HAR-1039
    0%
    $569.00
  34. PSI LS1 Oxygen Sensor Ext. Harness 4 Wire Square Gray

    4-Wire, Square, Gray, LS1

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    In Stock
    Part # HAR-1024
    0%
    $19.00
  35. PSI LS1 Tac Module Harness

    LS1

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    In Stock
    Part # HAR-1022
    0%
    $45.00
  36. PSI Vortec w/ T56 Standalone Wiring Harness

    2003-2007 GM Vortex with T56

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    In Stock
    Part # HAR-1015
    0%
    $579.00
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