$25 Off $250 / $50 Off $500, on Summit Racing Brand Products - Use Promo Code: BUILDIT

$25 Off $250 / $50 Off $500, on Summit Racing Brand Products - Use Promo Code: BUILDIT

Fall Clearance Sale - Save Today on The Parts You Need!

Filters

Selected Filters

Filter Results by Vehicle

Loading...

Availability

Wiring Harness Adapters and Extensions

Showing In Stock Items. Show All 72 Items.

Individual Parts
Part Groups

Results 1 - 25 of 56

Summit Racing™ MAP Sensor Adapters SUM-890133

Summit Racing™ MAP Sensor Adapters SUM-890133

Summit Racing™ MAP Sensor Adapters SUM-890133

Map Sensor Adapter, Convert LS1/LS2 Map Sensor to LS3 Sensor, Harness Adapter, Chevrolet V8, Each

Part Number: SUM-890133

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Tomorrow

...Loading

Estimated Ship Date: Tomorrow

Painless Performance Benchtop Flash Pigtails 60550

Made in the USA Painless Performance Benchtop Flash Pigtails 60550

Painless Performance Benchtop Flash Pigtails 60550

Wiring Pigtail, Benchtop Flash, OBD II, Chevy, Each

Part Number: PRF-60550

4.5 out of 5 stars ( 2 )

Estimated Ship Date: Tomorrow

...Loading

Estimated Ship Date: Tomorrow

ICT Billet Fuel Injector Plug Adapters WAINJ42

ICT Billet Fuel Injector Plug Adapters WAINJ42

ICT Billet Fuel Injector Plug Adapters WAINJ42

Wire Harness Wire Harness Adapter for USCAR EV6 to Denso Bosch Fast Fuel Injector

Part Number: ICB-WAINJ42

Not Yet Reviewed

Estimated Ship Date: Tomorrow

...Loading

Estimated Ship Date: Tomorrow

Caspers Electronics Fuel Injector Adapters 109076

Made in the USA Caspers Electronics Fuel Injector Adapters 109076

Caspers Electronics Fuel Injector Adapters 109076

Fuel Injector Connector Adapter, Jetronic/Minitimer/EV1 Injector, USCAR/EV6 Harness, Each

Part Number: CEI-109076

Not Yet Reviewed

Estimated Ship Date: Tomorrow

...Loading

Estimated Ship Date: Tomorrow

Caspers Electronics Fuel Injector Adapters 109077

Made in the USA Caspers Electronics Fuel Injector Adapters 109077

Caspers Electronics Fuel Injector Adapters 109077

Fuel Injector Connector Adapter, USCAR/EV6 Injector, Jetronic/Minitimer/EV1 Harness, Each

Part Number: CEI-109077

4.0 out of 5 stars ( 6 )

Estimated Ship Date: Tomorrow

...Loading

Estimated Ship Date: Tomorrow

Top Street Performance MAP Sensor Extension Harnesses 81034

Top Street Performance MAP Sensor Extension Harnesses 81034

Top Street Performance MAP Sensor Extension Harnesses 81034

Map Sensor Extension Harness, 24 in. Length, Each

Part Number: TSN-81034

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

...Loading

Estimated Ship Date: Tomorrow

ICT Billet MAP Sensor Harness Adapters WAMAP40-6

ICT Billet MAP Sensor Harness Adapters WAMAP40-6

ICT Billet MAP Sensor Harness Adapters WAMAP40-6

Wire Harness Adapter 6 in. LS Gen 4 (IV) Vehicle to Gen 3 MAP Sensor LS1 LS3 LSA

Part Number: ICB-WAMAP40-6

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

...Loading

Estimated Ship Date: Tomorrow

Caspers Electronics GM Opti Spark Wiring Harness Adapters for 1993 CAMARO, FIREBIRD, 1992-1993 CORVETTE - 108161

Made in the USA Caspers Electronics GM Opti Spark Wiring Harness Adapters for 1993 CAMARO, FIREBIRD, 1992-1993 CORVETTE - 108161

Caspers Electronics GM Opti Spark Wiring Harness Adapters for 1993 CAMARO, FIREBIRD, 1992-1993 CORVETTE - 108161

Opti Spark Adapter Harness, Chevy, Pontiac, 5.7L LT, Each

Part Number: CEI-108161

4.0 out of 5 stars ( 2 )

Estimated Ship Date: Tomorrow

...Loading

Estimated Ship Date: Tomorrow

ICT Billet Crankshaft Position Sensor Harness Adapters WACKP41-6

ICT Billet Crankshaft Position Sensor Harness Adapters WACKP41-6

ICT Billet Crankshaft Position Sensor Harness Adapters WACKP41-6

Adapter, Gen 5 Crankshaft Position Sensor to LS Gen IV Harness, Each

Part Number: ICB-WACKP41-6

Not Yet Reviewed

Estimated Ship Date: Tomorrow

...Loading

Estimated Ship Date: Tomorrow

FAST Fuel Injector Adapter Harnesses 170604-8

FAST Fuel Injector Adapter Harnesses 170604-8

FAST Fuel Injector Adapter Harnesses 170604-8

Fuel Injector Connector Adapter, USCAR/EV6 Injector, Jetronic/Minitimer/EV1 Harness, Set of 8

Part Number: FST-170604-8

Not Yet Reviewed

Estimated Ship Date: Dec 12, 2025 if ordered today

...Loading

Estimated Ship Date: Dec 12, 2025 if ordered today

Need It Sooner? We recommend these similar substitute parts:

BTR Fuel Injector Plug Adapters EV1/EV6-8

BTR Fuel Injector Plug Adapters EV1/EV6-8

5 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

...Loading

SCT Big Air MAF Cable Harness Adapters for 1988-1995 MUSTANG - 2901

SCT Big Air MAF Cable Harness Adapters for 1988-1995 MUSTANG - 2901

SCT Big Air MAF Cable Harness Adapters for 1988-1995 MUSTANG - 2901

MAF Adapter Cables, Harness Adapter, Black, Plastic, Each

Part Number: SCL-2901

4.5 out of 5 stars ( 6 )

Estimated Ship Date: Tomorrow

...Loading

Estimated Ship Date: Tomorrow

ICT Billet Crankshaft Position Sensor Harness Adapters WACKP30-6

ICT Billet Crankshaft Position Sensor Harness Adapters WACKP30-6

ICT Billet Crankshaft Position Sensor Harness Adapters WACKP30-6

Adapter LS Gen IV Crankshaft Position Sensor to Gen III Harness - 6

Part Number: ICB-WACKP30-6

Not Yet Reviewed

Estimated Ship Date: Tomorrow

...Loading

Estimated Ship Date: Tomorrow

Haltech Nexus Rebel LS Throttle Adapter Harnesses HT-186505

Haltech Nexus Rebel LS Throttle Adapter Harnesses HT-186505

Haltech Nexus Rebel LS Throttle Adapter Harnesses HT-186505

Harness Adapter, Nexus Rebel LS, DBW, 6-Pin, Chevrolet, LS, Each

Part Number: HTH-HT-186505

Not Yet Reviewed

Estimated Ship Date: Tomorrow

...Loading

Estimated Ship Date: Tomorrow

ICT Billet MAP Sensor Harness Adapters WAMAP30-6

ICT Billet MAP Sensor Harness Adapters WAMAP30-6

ICT Billet MAP Sensor Harness Adapters WAMAP30-6

Map Sensor Adapter, Convert LS Gen III Map Sensor Harness to 3-Bar Brick Style Sensor, Chevrolet, Each

Part Number: ICB-WAMAP30-6

Not Yet Reviewed

Estimated Ship Date: Tomorrow

...Loading

Estimated Ship Date: Tomorrow

BTR Fuel Injector Plug Adapters EV1/EV6-1

BTR Fuel Injector Plug Adapters EV1/EV6-1

BTR Fuel Injector Plug Adapters EV1/EV6-1

Wiring Harness Adapter, Fuel Injector Plug Adapter, Bosch EV6/USCAR 2-pin, Bosch EV1 2-pin, Each

Part Number: BTC-EV1EV61

Not Yet Reviewed

Estimated Ship Date: Tomorrow

...Loading

Estimated Ship Date: Tomorrow

JMS Chip MAF Harnesses JLS1LS3AD

Made in the USA JMS Chip MAF Harnesses JLS1LS3AD

JMS Chip MAF Harnesses JLS1LS3AD

Mass Air Meter Wiring Extension/Adapter -- GM LS1 conversion to LS3/LS7 MAF Sensor with IAT

Part Number: JMS-JLS1LS3AD

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Oct 20, 2025 if ordered today

...Loading

Estimated Ship Date: Oct 20, 2025 if ordered today

Caspers Electronics GM Opti Spark Wiring Harness Adapters for 1992 CORVETTE - 108199

Made in the USA Caspers Electronics GM Opti Spark Wiring Harness Adapters for 1992 CORVETTE - 108199

Caspers Electronics GM Opti Spark Wiring Harness Adapters for 1992 CORVETTE - 108199

Opti Spark Adapter Harness, Chevy, 5.7L LT, Each

Part Number: CEI-108199

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

...Loading

Estimated Ship Date: Tomorrow

FAST MAP Sensor Adapter Harnesses 308029

FAST MAP Sensor Adapter Harnesses 308029

FAST MAP Sensor Adapter Harnesses 308029

ADAMPER EARLYGYM

Part Number: FST-308029

4.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

...Loading

Estimated Ship Date: Tomorrow

Caspers Electronics Fuel Injector Adapters 109277

Made in the USA Caspers Electronics Fuel Injector Adapters 109277

Caspers Electronics Fuel Injector Adapters 109277

Injector Adapter, Multec 2 to EV1, Each

Part Number: CEI-109277

Not Yet Reviewed

Estimated Ship Date: Tomorrow

...Loading

Estimated Ship Date: Tomorrow

JMS Chip MAF Harnesses JLS2LS3ADX

Made in the USA JMS Chip MAF Harnesses JLS2LS3ADX

JMS Chip MAF Harnesses JLS2LS3ADX

Mass Air Meter Wiring Extension/Adapter, LS2 conversion to LS3/LS7 MAF Sensor, Each

Part Number: JMS-JLS2LS3ADX

Not Yet Reviewed

Estimated Ship Date: Oct 20, 2025 if ordered today

...Loading

Estimated Ship Date: Oct 20, 2025 if ordered today

Caspers Electronics MAF Harness Adapters 108100

Made in the USA Caspers Electronics MAF Harness Adapters 108100

Caspers Electronics MAF Harness Adapters 108100

Harness Adapter, MAF, 9.5 in. Wire Length, LS1 MAF To LT1 Engine, Each

Part Number: CEI-108100

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Tomorrow

...Loading

Estimated Ship Date: Tomorrow

DeatschWerks USCAR to Sumitomo Connector Adapters CONN-US-SUM

DeatschWerks USCAR to Sumitomo Connector Adapters CONN-US-SUM

DeatschWerks USCAR to Sumitomo Connector Adapters CONN-US-SUM

Fuel Injector Connector Adapter, USCAR/EV6 Injector, Sumitomo Harness, Each

Part Number: DWK-CONNUSSUM

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

...Loading

Estimated Ship Date: Tomorrow

DeatschWerks USCAR to Honda Double-Sided Connector Adapters CONN-US-HON

DeatschWerks USCAR to Honda Double-Sided Connector Adapters CONN-US-HON

DeatschWerks USCAR to Honda Double-Sided Connector Adapters CONN-US-HON

Fuel Injector Connector Adapter, USCAR/EV6 Injector, for Honda® Wide Slot Harness, Each

Part Number: DWK-CONNUSHON

Not Yet Reviewed

Estimated Ship Date: Oct 30, 2025 if ordered today

...Loading

Estimated Ship Date: Oct 30, 2025 if ordered today

Fleece Performance Valve Cover Conversion Harnesses for 2003-2005 RAM 2500, RAM 3500 - FPE-HAR-CUMM-VC-ADPT-EARLY

Fleece Performance Valve Cover Conversion Harnesses for 2003-2005 RAM 2500, RAM 3500 - FPE-HAR-CUMM-VC-ADPT-EARLY

Fleece Performance Valve Cover Conversion Harnesses for 2003-2005 RAM 2500, RAM 3500 - FPE-HAR-CUMM-VC-ADPT-EARLY

Wiring Harness, Valve Cover Conversion Harness, 4-Pin Injector to 6-Pin Injectors, Plug-n-Play, Dodge, Ram, 5.9L, Cummins, Each

Part Number: FLE-S0511

Not Yet Reviewed

Estimated Ship Date: Nov 7, 2025 if ordered today

...Loading

Estimated Ship Date: Nov 7, 2025 if ordered today

FAST Fuel Injector Adapter Harnesses 170603-8

FAST Fuel Injector Adapter Harnesses 170603-8

FAST Fuel Injector Adapter Harnesses 170603-8

Fuel Injector Connector Adapter, Jetronic/Minitimer/EV1 Injector, USCAR/EV6 Harness, Set of 8

Part Number: FST-170603-8

Not Yet Reviewed

Estimated Ship Date: Dec 15, 2025 if ordered today

...Loading

Estimated Ship Date: Dec 15, 2025 if ordered today

Modal Header

Call To Order

This is a custom order part. You can order this part by Contacting Us.

Summit Racing Speedcard. Synchrony Car Care.

Summit Racing Equipment SpeedCard

Jumpstart Your Next Project!

View Details|See if you Prequalify