2003 Wiring Harness Adapters and Extensions

Harness Adaptors, Holley EFI, LS3 MAP Sensor Adapter, Plug-and-Play, Pre-Terminated, Adapts to LS1/LS2 Engine, Chevy, 5.7L, 6.0L, Each

Part Number: HLY-558-416

4.89 out of 5 stars ( 18 )

Estimated Ship Date: Today

Harness Extension, MAP Sensor, 24 in. Length, Chevrolet, 3-Bar, Each

Part Number: ICB-WEMAP40-24

4.5 out of 5 stars ( 4 )

Estimated Ship Date: Today

Adapter Harnesses, Holley EFI, MAP Sensor Adapter, 3-pin Delphi GT to 3-pin Delphi M/P 150 Connector, Plug-and-Play, LS Engine Harness, Each

Part Number: HLY-558-467

4.5 out of 5 stars ( 2 )

Estimated Ship Date: Today

Map Sensor Adapter, Convert LS Gen III Map Sensor Harness to Gen IV LS Bosch Style Sensor, Chevrolet, Each

Part Number: ICB-WAMAP31-6

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

Harness Adapter, Each

Part Number: CEI-108103

4.53 out of 5 stars ( 17 )

Estimated Ship Date: Today

Map Sensor Adapter, Convert LS Gen III Map Sensor Harness to Gen IV LS Bosch Style Sensor, Nexus Rebel, Chevrolet, Each

Part Number: HTH-HT-186511

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

Wire Extension 24" LS Gen 3 MAP Manifold Absolute Pressure Sensor Connector

Part Number: ICB-WEMAP30-24

Not Yet Reviewed

Estimated Ship Date: Today

Harness Adapter, Early to Late GM TPS, Each

Part Number: FST-308022

5.0 out of 5 stars ( 5 )

Estimated Ship Date: Today

Breakout Adapter, FiTech to Late GM Adapter, Each

Part Number: CEI-108103FIT

4.5 out of 5 stars ( 2 )

Estimated Ship Date: Today

Wire Extension LS Gen 3 White 3-Wire CKP Crankshaft Position Sensor Connector

Part Number: ICB-WECKP30-36

Not Yet Reviewed

Estimated Ship Date: Today

Harness Extension, MAP Sensor, 26 in. Length, Chevy, Each

Part Number: CEI-109080

5.0 out of 5 stars ( 6 )

Estimated Ship Date: Today

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

Part Number: ICB-WACKP30-6

Not Yet Reviewed

Estimated Ship Date: Today

Wire Extension Harness 24" LS Gen 3 MAF Mass Air Flow Sensor Wiring LS1 5.7L

Part Number: ICB-WEMAF30-24

Not Yet Reviewed

Estimated Ship Date: Today

Map Sensor Adapter, Convert LS1/LS2 Map Sensor to LS3 Sensor, Harness Adapter, Chevy, LS, Each

Part Number: TSN-81033

Not Yet Reviewed

Estimated Ship Date: Today

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: Today

Adapter LS Gen III Crankshaft Position Sensor to Gen IV Harness – 6"

Part Number: ICB-WACKP40-6

Not Yet Reviewed

Estimated Ship Date: May 15, 2026 if ordered today

• Drop Ship
• Special Order

ADAMPER EARLYGYM

Part Number: FST-308029

4.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

Cummins Crankshaft Position Sensor Extension Harness

Part Number: FLE-S0406

Not Yet Reviewed

Estimated Ship Date: Today