MODERN LS PERFORMANCE WITH CLASSIC SMALL BLOCK OR BIG BLOCK STYLING

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"Classic Style" Standalone LS Engine Harness

SKU: HAR-CLASSIC

HAR-CLASSIC

$699.99
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Classic LS Intake Kit

SKU: INT-CLASSIC-KIT

INT-CLASSIC-KIT

$699.99
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Classic Style Single Plane LS Intake Manifold

SKU: INT-CLASSIC

INT-CLASSIC

$449.99
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Air Cleaner Adapter Kit for Classic Style LS

SKU: THR-9930

THR-9930

$249.99
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Billet Classic LS Air Cleaner Adapter

SKU: THR-3011

THR-3011

$99.99
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Billet Classic LS Throttle Body Adapter

SKU: THR-3501

THR-3501

$149.99
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UNIVERSAL 4BBL 1000CFM THROTTLE BODY

SKU: 112-58X

112-58X

$509.95
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MR. GASKET COMPETITION AIR CLEANER - FLAT BLACK

SKU: 9790BP

9790BP

$46.07
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Classic Intake Manifold Kit for LS Engines

SKU: HOLLEY-CLASSIC-KIT

HOLLEY-CLASSIC-KIT

$799.99
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Single Plane LS7 Intake Manifold

SKU: 300-269

300-269

$403.95
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Single Plane LS3 Intake Manifold

SKU: 300-136

300-136

$424.95
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Single Plane LS1 Intake Manifold

SKU: 300-137

300-137

$424.95
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Single Plane LS3 Split-Design Intake Manifold

SKU: 300-290

300-290

$631.95
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Single Plane LS1 Split-Design Intake Manifold

SKU: 300-255

300-255

$651.95
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4150 TO 92MM LS DRIVE BY WIRE THROTTLE BODY ADAPTER

SKU: 17-93

17-93

$163.95
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4150 TO 105 MM LS DRIVE BY WIRE THROTTLE BODY ADAPTER

SKU: 17-94

17-94

$159.95
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Small Block to LS Valve Cover Adapter Plates

SKU: 241-296

241-296

$238.95
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LS3 SINGLE PLANE FUEL RAIL KIT

SKU: 534-218

534-218

$212.95
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LS1 SINGLE PLANE FUEL RAIL KIT

SKU: 534-219

534-219

$212.95
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Classic LS Kit w/ Drive By Cable Throttle Body

SKU: LS-DBC-101

LS-DBC-101

$1,799.95
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Holley DBW Retro Filter for LS3 Throttle Body

SKU: RETRO-FILTER

RETRO-FILTER

$194.95

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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Classic LS

"Classic Style" Standalone LS Engine Harness

Classic LS Intake Kit

Classic Style Single Plane LS Intake Manifold

Air Cleaner Adapter Kit for Classic Style LS

Billet Classic LS Air Cleaner Adapter

Billet Classic LS Throttle Body Adapter

UNIVERSAL 4BBL 1000CFM THROTTLE BODY

MR. GASKET COMPETITION AIR CLEANER - FLAT BLACK

Classic Intake Manifold Kit for LS Engines

Single Plane LS7 Intake Manifold

Single Plane LS3 Intake Manifold

Single Plane LS1 Intake Manifold

Single Plane LS3 Split-Design Intake Manifold

Single Plane LS1 Split-Design Intake Manifold

4150 TO 92MM LS DRIVE BY WIRE THROTTLE BODY ADAPTER

4150 TO 105 MM LS DRIVE BY WIRE THROTTLE BODY ADAPTER

Small Block to LS Valve Cover Adapter Plates

LS3 SINGLE PLANE FUEL RAIL KIT

LS1 SINGLE PLANE FUEL RAIL KIT

Classic LS Kit w/ Drive By Cable Throttle Body

Holley DBW Retro Filter for LS3 Throttle Body

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