LS & LT Harnesses and Accessories

Upgrade your classic car or truck with the latest in LS/LT engine technology using Classic Performance Products' (CPP) wide range of LS/LT Harnesses and Accessories. As a trusted source for aftermarket parts, CPP provides ... everything you need for a easy and hassle-free LS or LT engine swap in your classic vehicle.

Everything You Need for LS/LT Engine Swaps
At CPP, we understand the intricacies involved in updating your classic ride with modern performance. That's why we offer an extensive selection of high-quality LS/LT engine wiring harnesses, electrical components, and accessories tailored specifically for classic cars and trucks. Whether you're working on a Chevy truck, Chevy Tri-Five, Camaro, Nova, Chevelle, El Camino, or even Ford cars and trucks, our products are designed for precise fitment and

Quality and Compatibility You Can Trust
Our LS/LT harnesses and accessories are engineered for durability and reliability, ensuring your engine swap project is both efficient and successful. From individual components to complete turnkey standalone harnesses, we provide everything needed to power your LS engine swap, delivering long-lasting performance and meeting the distinct demands of a variety of classic makes and models.

Seamless Integration for a Smooth Upgrade
With CPP's range of LS/LT products, you can expect seamless integration into your classic vehicle. Our harnesses and accessories are designed to simplify your engine conversion process, offering reliable connections and reducing installation time. This means you'll spend less time troubleshooting and more time enjoying the powerful performance of your upgraded engine.

Choose Classic Performance Products for all your LS/LT harness and accessory needs, and experience unrivaled quality, compatibility, and customer support. Trust us to deliver the products that make your classic car's LS or LT engine upgrade smooth, reliable, and hassle-free.

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
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
PSI Vortec DBC w/ T56 Standalone Wiring Harness w/ LS3 Injectors
1999-2006 Vortec with T56 and with LS3 Injectors
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In Stock

Part # HAR-1093

0%

$549.00
PSI Gen IV Manual Transmission Wire Harness w/ T56/TR6060
2008-2009 Manual Transmission with T56/TR6060
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In Stock

Part # HAR-1045

0%

$569.00
PSI Vortec w/ 6L80E Auto Transmission Wiring Harness 2 Pin
2010-2013 L99 6.2L Vortec with 6L80E Auto Transmission, 2 Pin
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In Stock

Part # HAR-1079

0%

$719.00
PSI DBC T56 Standalone Wiring Harness
1999-2003 Vortec with T56
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In Stock

Part # HAR-1019

0%

$549.00
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
PSI Gen IV Wire Harness Manual Transmission w/ T56/TR6060
2005-2007 LS2 Manual Transmission with T56/TR6060
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In Stock

Part # HAR-1063

0%

$569.00
PSI Gen IV Standalone Wire Harness w/ T56/TR6060
2006-2013 LS7 with T56/TR6060
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In Stock

Part # HAR-1035

0%

$569.00
PSI Wiring Harness LH8 w/ 6L80E
2009-2014 5.3L LY5, LMG or LH8 with 6L80E
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In Stock

Part # HAR-1073

0%

$719.00
PSI Vortec T56/TR6060 Standalone Wiring Harness
2007-2008 Vortec T56/TR6060
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In Stock

Part # HAR-1039

0%

$569.00

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