LS/Vortec Extensions

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Gen 3 oxygen sensor extension harness (4 wire square grey)

SKU: HAR-1024

HAR-1024

$24.99

(1)
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Gen 3 oxygen sensor extension harness (4 wire square black)

SKU: HAR-1010

HAR-1010

$24.99

(2)
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Gen 4 oxygen sensor extension harness (4 wire triangle gray)

SKU: HAR-1034

HAR-1034

$24.99

(2)
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Gen 5 oxygen sensor extension harness (4 flat)

SKU: HAR-2015

HAR-2015

$39.99
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Gen 2/3 LT/LS oxygen sensor extension harness (4 Flat)

SKU: HAR-1001

HAR-1001

$24.99
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Gen 3 5 pin LS2 /LS6/Vortec MAF extension harness 18in

SKU: EXT-1017

EXT-1017

$49.99
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Gen 4 LS3/LS7/Vortec engine MAF extension harness

SKU: EXT-1015

EXT-1015

$29.00
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LS/Vortec coil extension harness

SKU: HAR-1049

HAR-1049

$49.00
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GEN 4 Corvette/CTS-V pedal extension harness

SKU: EXT-1019

EXT-1019

$29.00
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LS2/LS3 rear to front cam sensor extension

SKU: EXT-1008

EXT-1008

$29.00
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Gen 3 Side knock sensor extension

SKU: EXT-1011

EXT-1011

$35.00

(1)
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Gen 3/4 Delphi to Bosch MAP sensor extension / adapter harness

SKU: EXT-1010

EXT-1010-1

$29.00

(2)
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Gen 3/4 Delphi to Bosch MAP sensor supercharger extension / adapter harness (long)

SKU: EXT-1010-2-LSA

EXT-1010-2-LSA

$29.00
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Gen 3 LS/Vortec coil sub-harness

SKU: HAR-1050

HAR-1050

$74.00

(1)
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Gen 3 LS/Vortec coil sub-harness (Short)

SKU: HAR-1051

HAR-1051

$74.00
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Gen 3/4 LS/Vortec coil sub-harness

SKU: HAR-1052

HAR-1052

$74.00

(2)
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Gen 3/4 LS/Vortec coil sub-harness (Short)

SKU: HAR-1053

HAR-1053

$74.00
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Map Extension Harness (Bosch To Bosch) 24"

SKU: EXT-1018

EXT-1018

$29.00

(0)
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MAF adapter/extension LS3 IAT breakout

SKU: EXT-1016

EXT-1016

$49.99

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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LS/Vortec Extensions

Gen 3 oxygen sensor extension harness (4 wire square grey)

Gen 3 oxygen sensor extension harness (4 wire square black)

Gen 4 oxygen sensor extension harness (4 wire triangle gray)

Gen 5 oxygen sensor extension harness (4 flat)

Gen 2/3 LT/LS oxygen sensor extension harness (4 Flat)

Gen 3 5 pin LS2 /LS6/Vortec MAF extension harness 18in

Gen 4 LS3/LS7/Vortec engine MAF extension harness

LS/Vortec coil extension harness

GEN 4 Corvette/CTS-V pedal extension harness

LS2/LS3 rear to front cam sensor extension

Gen 3 Side knock sensor extension

Gen 3/4 Delphi to Bosch MAP sensor extension / adapter harness

Gen 3/4 Delphi to Bosch MAP sensor supercharger extension / adapter harness (long)

Gen 3 LS/Vortec coil sub-harness

Gen 3 LS/Vortec coil sub-harness (Short)

Gen 3/4 LS/Vortec coil sub-harness

Gen 3/4 LS/Vortec coil sub-harness (Short)

Map Extension Harness (Bosch To Bosch) 24"

MAF adapter/extension LS3 IAT breakout

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