2003 Holley Parts and Accessories

Valve Covers, Aluminum LS, Centerbolt, Tall, Cast Aluminum, Orange Powdercoated, Gloss Finish, Chevy, 5.7L, 6.0L, 6.2L, 7.0L,Pair

Part Number: HLY-241-164

2.5 out of 5 stars ( 2 )

Estimated Ship Date: Tomorrow

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Engine Management Systems, Terminator X MAX, 8-EV1 Injectors, 8-Coils, Sensors, Chevy, LS, 5.7L, 1x Cam, 24x Crank, Kit

Part Number: HLY-550-929

5.0 out of 5 stars ( 1 )

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Accessory Drive Systems, LS Engine Swap, Serpentine, Black Air Conditioning Pulley, Sanden SD-7 Compressor, Tensioner, Chevrolet, Small Block LS, Kit

Part Number: HLY-20-160

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Spacer and Adapters, LS Valve Cover, Adapter, Perimeter Bolt, Cast Aluminum, 1.385 in. Thick, Polished, Chevy, LS, 4.8-7.0L, Kit

Part Number: HLY-241-296

5.0 out of 5 stars ( 1 )

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Harmonic Balancer Bolts, Replacement, Steel, Black E-Coat, 1/2 in.-20 Thread, 2.5 in. Long, 12-Point Head, Washer included, Chevy, 6.5-8.1L, Each

Part Number: HLY-97-321

3.0 out of 5 stars ( 2 )

Estimated Ship Date: Tomorrow

Throttle Bodies, LS Style, Multi-Port Injection, Cable Actuated, 90mm Bore, Billet Aluminum, Black Anodized, Chevy, 4.8-7.0L, LS Based, Each

Part Number: HLY-112-589

5.0 out of 5 stars ( 5 )

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Alternators, Premium, OE Style, Cast Aluminum, Polished Finish, 150 amps, 12V, Internal Regulator, Serpentine Pulley, Chevy, 4.8-7.0L, Each

Part Number: HLY-197-304

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Estimated Ship Date: Mar 4, 2026 if ordered today

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Power Steering Pumps, Saginaw TC Series, Natural Finish, Reservoir, Black, Hose Barb Inlet, M16x1.5 Outlet, Pump Only, Chrysler, Dodge, Jeep Ram, Each

Part Number: HLY-198-104

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Estimated Ship Date: Mar 3, 2026 if ordered today

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Valve Covers, Aluminum LS, Centerbolt, Plain Top, Cast Aluminum, Natural Finish, Baffled, Chevy, LS, 4.8L, 5.3L, 5.7L, 6.0L, 6.2L, 7.0L, Pair

Part Number: HLY-241-88

4.38 out of 5 stars ( 8 )

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Engine Management Systems, Terminator X MAX, 8-EV1 Injectors, 8-Coils, Plug-and-Play, Drive-by-Wire, Tuner/Trans Control, 4R70W, Ford, 4.6L, 5.4L, Kit

Part Number: HLY-550-1316

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Engine Management Systems, Terminator X MAX, 8-EV1 Injectors, 8-Coils, Trans Control, Sensors, USB Tune Cable, Chevy, LS, 5.7L, 1x Cam, 24x Crank, Kit

Part Number: HLY-550-916T

5.0 out of 5 stars ( 2 )

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Alternator Brackets, Low-Mount, Aluminum, Black, Chevy, Kit

Part Number: HLY-20-166BK

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Throttle Linkage, Dual-Plenum EFI Linkage Kit, 102mm Throttle Bodies, Includes Brackets, Plate, Cables, and Hardware, Chevy, LS, Kit

Part Number: SNE-860030

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

Part Number: HLY-550-656

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Engine Management Systems, Terminator X, Up to 8-EV6 Injectors, 8-Coils, Analog, O2 Sensor, Plug-and-Play, 3.5 in. Controller, Ford, 4.6L, 5.4L, Kit

Part Number: HLY-550-1217

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

Part Number: HLY-550-1029

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Engine Oil Filler Caps, LS Engine Oil Fill Caps, Dished, Round, Screw-in, Aluminum, Silver, Chevrolet, Small Block LS, Each

Part Number: HLY-241-198

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Estimated Ship Date: Tomorrow

Gaskets, Replacement, Port Flange, O-ring, Size 2-234, Intake Model 300-255, 300-256, 300-290, 300-291, 8-piece, Set

Part Number: HLY-508-28

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

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

Part Number: HLY-550-1021

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Estimated Ship Date: Mar 4, 2026 if ordered today

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Ignition Coil Wiring Harnesses, Holley EFI, Coil Harness, Ford 2V Modular, Plug-and-Play, for HP, Dominator EFI Systems, Ford, Lincoln, Mercury, Each

Part Number: HLY-558-314

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Wiring Harnesses, Holley EFI, Gen III Hemi, Throttle Position, Idle Air Controls, Factory Connectors, Chrysler, Dodge, Jeep, Hemi, Early Model, Each

Part Number: HLY-558-115

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Estimated Ship Date: Mar 4, 2026 if ordered today

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Brackets, Sniper EFI, Throttle Cable Mount, Intake Manifold, Aluminum, Silver, for Sniper EFI, Fabricated, with Hardware, Chevy, LS, 5.7L, 6.0L, Kit

Part Number: SNE-870016

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

Intake Manifold Studs, Lo-Ram, Steel, Natural, Standard 6-point Nuts, Chevy, Small Block LS, Kit

Part Number: HLY-300-612

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Crank Trigger Wheels, Holley EFI, Replacement, 12-1X, Hall Effect, 6.25 in. Diameter, Aluminum, Silver, Chevy, LS, Small Block, Each

Part Number: HLY-556-185

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Estimated Ship Date: Mar 3, 2026 if ordered today

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Oil Fill Caps, LS Engine, Twist-in, Octagon Shape, Natural, Aluminum Cap, O-ring Included, for Holley LS Valve Covers, Each

Part Number: HLY-241-225

3.0 out of 5 stars ( 2 )

Estimated Ship Date: Tomorrow