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

4.88 out of 5 stars ( 17 )

Estimated Ship Date: Today

Throttle Body Adapter Harness, 6-Wire, Chevy, LS, 5.3, 6.2 Gen IV Engines, Each

Part Number: ICB-WETHB40-12

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

Throttle Body Adapter Harness, LS2 Throttle Body to LS1 Vehicle, Each

Part Number: CEI-108115

4.1 out of 5 stars ( 10 )

Estimated Ship Date: Today

Throttle Body Adapter Harness, 24 in. Long, Each

Part Number: CEI-109133

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Today

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

Part Number: CEI-109103

4.0 out of 5 stars ( 3 )

Estimated Ship Date: Today

Wiring Harness, MAF/IAT Breakout-GT Series Dense, Each

Part Number: CEI-108136

5.0 out of 5 stars ( 9 )

Estimated Ship Date: Today

Extension Harness, MAF/IAT Breakout, Chevy, Pontiac, Each

Part Number: CEI-108165

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Today

Harness Extension, MAF Sensor, 48 in. Length, Chevrolet, 5-Wire, Each

Part Number: ICB-WEMAF31-48

Not Yet Reviewed

Estimated Ship Date: Today

Wiring Pigtail, Fuel Injector, Early to Late GM TPS, Each

Part Number: FST-308030

5.0 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, Nexus Rebel, Chevrolet, Each

Part Number: HTH-HT-186511

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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: Today

Mass Air Meter Wiring Extension -- LS3 and LS7 MAF

Part Number: JMS-JLS3EXT

Not Yet Reviewed

Estimated Ship Date: Today

Throttle Body Adapter Harness, Position Sensor, GM, LS2, LS3, LS7, LS9, LSA, Each

Part Number: LPE-CE105454

3.67 out of 5 stars ( 3 )

Estimated Ship Date: Feb 24, 2026 if ordered today

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MAF Wiring Harness Adapter, 100mm, Each

Part Number: LPE-CE108124

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Feb 24, 2026 if ordered today

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Mass Air Wiring Adapter, 5-PIN to Slot Style, Each

Part Number: GRN-130108

Not Yet Reviewed

Estimated Ship Date: Feb 3, 2026 if ordered today

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