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Holley HP EFI ECU and Harness Kits 550-604

Engine Management Systems, HP EFI, ECU and Harness, Up to 16-Injectors, 8-Coils, Four Digital Inputs, Wideband, CANBUS, Universal, MPFI, Kit

Part Number: HLY-550-604

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Holley LS Engine Swap Accessory Drive Systems 20-137BK

Accessory Drive Systems, LS Engine Swap, Serpentine, Black, Air Conditioning Pulley, Compressor, Tensioner, Chevy, LS, 4.8-7.0L, Kit

Part Number: HLY-20-137BK

5.0 out of 5 stars ( 1 )

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Holley Terminator X Stealth 4150 58X LS EFI Fuel Injection Systems 550-1061

Fuel Injection Systems, Terminator X, Stealth 4150, 58X LS EFI, Four Injector, Throttle Body, Speed Density, Aluminum, Black, Chevy, 4.8-7.0L, Kit

Part Number: HLY-550-1061

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Holley Terminator X Stealth 4150 24X LS EFI Fuel Injection Systems 550-1020

Fuel Injection Systems, Terminator X, Stealth 4150, 24X LS EFI, Four Injector, Throttle Body, Speed Density, Aluminum, Shiny, Chevy, 4.8-7.0L, Kit

Part Number: HLY-550-1020

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Estimated Ship Date: Oct 15, 2025 if ordered today

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Estimated Ship Date: Oct 15, 2025 if ordered today

Holley LS Engine Swap Accessory Drive Systems 20-136

Pulley Kits, LS Swap, Serpentine, Alternator, Power Steering, A/C, GM Type 2, 130 Amp Alternator, Natural, Kit

Part Number: HLY-20-136

3.0 out of 5 stars ( 1 )

Estimated Ship Date: Oct 15, 2025 if ordered today

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Estimated Ship Date: Oct 15, 2025 if ordered today

Holley Mid-Mount Complete Accessory Systems 20-200BK

Accessory Drive Systems, LT Mid-Mount, Serpentine, Alternator, Power Steering, AC, Water Pump, Pulleys, 6-groove, Black Finish, Chevy, 5.3L, 6.2L, Kit

Part Number: HLY-20-200BK

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Holley Mid-Mount Complete Accessory Systems 20-163

Accessory Drive Systems, Mid-Mount, Natural, Serpentine, 6-groove, GM Type 2, Sanden SD-7, Chevy, LSA/LS, Kit

Part Number: HLY-20-163

5.0 out of 5 stars ( 1 )

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Holley Terminator X Engine Management Systems 550-1213

Engine Management Systems, Terminator X, Up to 8-EV6 Injectors, 8-Coils, Analog Input, O2 Sensor, Plug-and-Play, 3.5 in. Controller, Ford, 5.0L, Kit

Part Number: HLY-550-1213

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Holley Terminator X MAX Stealth 4150 58X LS EFI Fuel Injection Systems 550-1064

Fuel Injection Systems, Terminator X Max, Stealth 4150, 58X LS EFI, Four Injector, Throttle Body, Aluminum, Black, Trans Control, Chevy, 4.8-7.0L, Kit

Part Number: HLY-550-1064

5.0 out of 5 stars ( 1 )

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Holley Sniper 2 EFI 650 HP Return-Type Fuel Injection Systems with Power Distribution Module 550-511-5PR

Fuel Injection System, Sniper 2, Self-Tuning, Throttle body, Black, 4150 Flange, 650 hp Max, 800 CFM, Return Style Pump, PDM, 5 in. Display, Kit

Part Number: SNE-550-511-5PR

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Holley Sniper 2 EFI 650 HP Returnless Fuel Injection Systems with Power Distribution Module 550-510-5PD

Fuel Injection System, Sniper 2, Self-Tuning, Throttle body, Polished, 4150 Flange, 650 hp Max, 800 CFM, Returnless Pump, PDM, 5 in. Display, Kit

Part Number: SNE-550-510-5PD

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Holley Mid-Mount Complete Accessory Systems 20-200

Accessory Drive Systems, LT Mid-Mount, Serpentine, Alternator, Power Steering, AC, Water Pump, Pulleys, 6-groove, Natural, Chevy, 5.3L, 6.2L, Kit

Part Number: HLY-20-200

2.5 out of 5 stars ( 2 )

Estimated Ship Date: Oct 16, 2025 if ordered today

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Estimated Ship Date: Oct 16, 2025 if ordered today

Need It Sooner? We recommend these similar substitute parts:

Holley Mid-Mount Complete Accessory Systems 20-200BK

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Holley HP EFI ECU and Harness Kits 550-602N

Engine Management Systems, HP EFI, ECU and Harness, Up to 16-Injectors, 8-Coils, Four Digital Inputs, NKT O2 Sensor, GM, LS, 24x Crank Sensor, Kit

Part Number: HLY-550-602N

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Holley Mid-Mount Complete Accessory Systems 20-291

Accessory Drive Systems, Gen III, Hemi VVT, Mid-Mount System, Natural Finish, Alternator, A/C, P/S, Water Pump, Chrysler, Dodge, 5.7L, 6.4L, Kit

Part Number: HLY-20-291

Not Yet Reviewed

Estimated Ship Date: Oct 16, 2025 if ordered today

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Estimated Ship Date: Oct 16, 2025 if ordered today

Holley Terminator LS Plug-and-Play Multi-Port Systems 550-614

Engine Management Systems, Terminator LS, Plug-andPlay, 8-Injectors, 8-Coils, Analog Inputs, with Controller, Chevy, Truck, 4.8-6.0L, 24x Crank, Kit

Part Number: HLY-550-614

4.0 out of 5 stars ( 1 )

Estimated Ship Date: Oct 16, 2025 if ordered today

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Estimated Ship Date: Oct 16, 2025 if ordered today

Holley Terminator X MAX Stealth 4150 24X LS EFI Fuel Injection Systems 550-1028

Fuel Injection Systems, Terminator X Max, Stealth 4150, 24X LS EFI, Four Injector, Throttle Body, Aluminum, Shiny, Trans Control, Chevy, 4.8-7.0L, Kit

Part Number: HLY-550-1028

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Holley High-Mount Complete Accessory Systems 20-310BK

Accessory Drive Systems, High-Mount, Serpentine, Alternator, Power Steering, AC, Water Pump, Aluminum, Black, Timing Cover, Ford, 7.3L Godzilla, Kit

Part Number: HLY-20-310BK

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Holley Terminator X Stealth 4500 EFI Throttle Bodies 534-302

Throttle Bodies, Terminator X, Stealth 4500 EFI, Cable Actuation, Eight Injectors, 100 lb/hr, Cast Aluminum, Black Finish, with Sensors, Each

Part Number: HLY-534-302

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Holley Terminator X Stealth 4150 58X LS EFI Fuel Injection Systems 550-1062

Fuel Injection Systems, Terminator X, Stealth 4150, 58X LS EFI, Four Injector, Throttle Body, Speed Density, Aluminum, Gold, Chevy, 4.8-7.0L, Kit

Part Number: HLY-550-1062

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Holley Sniper 2 EFI 650 HP Return-Type Fuel Injection Systems with Power Distribution Module 550-510-5PR

Fuel Injection System, Sniper 2, Self-Tuning, Throttle body, Polished, 4150 Flange, 650 hp Max, 800 CFM, Return Style Pump, PDM, 5 in. Display, Kit

Part Number: SNE-550-510-5PR

Not Yet Reviewed

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Holley Sniper 2 EFI 650 HP Base Fuel Injection Systems with Power Distribution Module 550-510-5PX-SBF

Fuel Injection System, Sniper 2, Self-Tuning, Throttle body, Polished, 4150 Flange, 650 hp Max, 800 CFM, No Pump, PDM, 5.0 in. Display, Ford, Kit

Part Number: SNE-5505105PXSBF

Not Yet Reviewed

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Holley Sniper 2 EFI 650 HP Returnless Fuel Injection Systems 550-511-5XD

Fuel Injection System, Sniper 2, Self-Tuning, Throttle body, Black, 4150 Flange, 650 hp Max, 800 CFM, Returnless Pump, 5 in. Display, Kit

Part Number: SNE-550-511-5XD

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Holley Sniper 2 EFI 650 HP Returnless Fuel Injection Systems with Power Distribution Module 550-510-3PD

Fuel Injection System, Sniper 2, Self-Tuning, Throttle body, Polished, 4150 Flange, 650 hp Max, 800 CFM, Returnless Pump, PDM, 3.5 in. Display, Kit

Part Number: SNE-550-510-3PD

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Holley Dominator EFI Vehicle Management Systems 550-657

Engine Management Systems, Dominator EFI, 24-EV1 Injectors, 12-Coils, Analog/Digital, Drive-by-wire, 1x Cam Sensor, Chevy, 5.7L, 6.0L, 24x Crank, Kit

Part Number: HLY-550-657

Not Yet Reviewed

Estimated Ship Date: Oct 16, 2025 if ordered today

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Estimated Ship Date: Oct 16, 2025 if ordered today

Holley Dominator EFI Vehicle Management Systems 550-658

Engine Management Systems, Dominator EFI, 24-EV1 Injectors, 12-Coils, Analog/Digital, Trans Control, 4x Cam Sensor, Chevy, 4.8-7.0L, 58x Crank, Kit

Part Number: HLY-550-658

Not Yet Reviewed

Estimated Ship Date: Oct 16, 2025 if ordered today

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Estimated Ship Date: Oct 16, 2025 if ordered today

Holley Parts and Accessories