2003 Holley - In Stock Filter Options - Vendor In Stock Filter Options - Free Shipping on Orders Over $109 at Summit Racing

Holley EFI Hi-Ram Intake Manifold Tops 300-245

Intake Manifolds, EFI, Hi-Ram, Multi-port, Top Only, 95mm Bore, Cast Aluminum, Satin Finish, Chevy, LS, 4.8L, 5.3L, 5.7L, 6.0L, 6.2L, 7.0L,Each

Part Number: HLY-300-245

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Holley LS Split Design Carbureted Intake Manifolds 300-295

Intake Manifolds, LS Split Design Carbureted, Single Plane, Aluminum, Natural, 4500 Dominator, Chevrolet, LS1, LS2, LS6, Each

Part Number: HLY-300-295

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Holley LS Valley Covers 241-262

Lifter Valley Plates, LS Valley, Billet Aluminum, Trussed, Black Anodized, 10-bolt Pattern, Chevy, LS, 4.8L, 5.3L, 5.7L, 6.0L, Each

Part Number: HLY-241-262

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Holley Replacement Fuel Injector Wiring Harnesses 558-214

Fuel Injection System Wiring Harnesses, Holley EFI, Replacement, MPFI, Mass Airflow, Injector Harness, LS Multec 2, Chevy, Truck, 4.8-6.0L, Each

Part Number: HLY-558-214

5.0 out of 5 stars ( 3 )

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Holley EFI Hi-Ram Intake Manifold Tops 300-246

Intake Manifolds, EFI, Hi-Ram, Multi-port, Top Only, 105mm Bore, Cast Aluminum, Satin Finish, Chevy, LS, 4.8L, 5.3L, 5.7L, 6.0L, 6.2L, 7.0L,Each

Part Number: HLY-300-246

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Holley Aluminum LS Valve Covers 241-404

Valve Covers, Tall -plus 0.54 in. Inside, Centerbolt, Chevrolet Logo, Cast Aluminum, Red Gloss Finish, Baffled, w/Grommets, Hardware, Chevy, LS, Pair

Part Number: HLY-241-404

4.0 out of 5 stars ( 1 )

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Holley Sniper EFI Fuel Rails 850001

Fuel Rails, Sniper EFI, Billet Aluminum, Black Anodized, -8 AN Inlet, Hardware, Fittings, for Sniper EFI Intakes, Chevy, LS, 5.7L, 6.0L, Kit

Part Number: SNE-850001

5.0 out of 5 stars ( 4 )

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Holley LS Valley Covers 241-367

Lifter Valley Plates, LS Valley, Billet Aluminum, Trussed with Oil Fill, Natural Finish, 10-Bolt Pattern, Chevy, LS, 5.7L, Each

Part Number: HLY-241-367

5.0 out of 5 stars ( 1 )

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Holley LS Valley Covers 241-260

Lifter Valley Plates, LS Valley, Billet Aluminum, Trussed, Natural Finish, 10-bolt Pattern, Chevy, LS, 4.8L, 5.3L, 5.7L, 6.0L, Each

Part Number: HLY-241-260

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Holley LS Engine Air Conditioner Brackets 20-133

Air Conditioning Compressor Brackets, for R4 Compressor, Aluminum, Natural, Chevy, Small Block LS, Each

Part Number: HLY-20-133

4.0 out of 5 stars ( 10 )

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Holley LS Engine Accessory Drive Kits 20-131

Accessory Drive Bracket Kits, for R4 Compressor, Aluminum, Natural, Chevy, Small Block LS, Kit

Part Number: HLY-20-131

3.67 out of 5 stars ( 3 )

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Holley LS Engine Swap Accessory Drive Systems 20-138BK

Pulley Sets, Serpentine, LS Engine Swap Accessory Drive System, Sanden 7B10 A/C Only, Black Powdercoated, Chevy, GMC, V8, Kit

Part Number: HLY-20-138BK

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Mar 4, 2026 if ordered today

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Estimated Ship Date: Mar 4, 2026 if ordered today

Holley RetroFilter Drive-By-Wire Air Cleaners 120-501

Air Cleaners, Retrofilter, Drive-By-Wire, 16 in. Round, Aluminum, Black, Cotton Gauze Filter, Red, GM LS 4-Bolt 92mm Throttle Body, Kit

Part Number: HLY-120-501

1.0 out of 5 stars ( 1 )

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Holley LS Steam Vent Kits 26-552

Engine Coolant Crossover, LS Steam Vent, Aluminum, Black Anodized, Chevy, Small Block, Kit

Part Number: HLY-26-552

5.0 out of 5 stars ( 2 )

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Holley Gen III Hemi Retrofit Oil Pans 302-63BK

Oil Pans, Gen III Hemi, RetroFit, Wet Sump, Rear, 6.2 Quart, Dipstick Compatible, Cast Aluminum, Black, Chrysler, Dodge, GMC, Plymouth, 376ci,

Part Number: HLY-302-63BK

5.0 out of 5 stars ( 2 )

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Holley EFI Remote LS Coil Relocation Brackets 561-128

Ignition Coil Brackets, Holley EFI, Gen III, LS Ignition Coil, Remote Relocation Bracket, Aluminum, Black Finish, Hardware Included, Pair

Part Number: HLY-561-128

3.67 out of 5 stars ( 3 )

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Holley Sniper EFI Cable Bracket Kits 870017

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

Part Number: SNE-870017

5.0 out of 5 stars ( 1 )

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Holley Crankshaft Trigger Wheels 556-180

Crank Trigger Replacement Wheels, 8 in. Diameter, 12-1X, Crank Trigger Wheel, Aluminum, Natural Finish, 3-wire Hall Effect, Chevy, Ford, Each

Part Number: HLY-556-180

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Holley Aluminum LS Valve Covers 241-110

Valve Covers, Aluminum LS, Centerbolt, Tall, Plain, Cast Aluminum, Natural Finish, Chevy, LS, 4.8-7.0L, Pair

Part Number: HLY-241-110

4.8 out of 5 stars ( 15 )

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Holley LS Split Design Carbureted Intake Manifolds 300-295BK

Intake Manifolds, LS Split Design Carbureted, Single Plane, Aluminum, Black, 4500 Dominator, Chevrolet, LS1, LS2, LS6, Each

Part Number: HLY-300-295BK

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Holley Drop-In Fuel Module Assemblies for 2001-2004 MUSTANG - 12-946

Fuel Pumps, Drop-In Fuel Module, Electric, In-Tank, 255 lph, 12V, Sending Unit, Stock Inlet and Outlet, Ford, Mustang, 3.8L, 3.9L, 4.6L, Each

Part Number: HLY-12-946

5.0 out of 5 stars ( 2 )

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Holley Gen III Hemi Retrofit Oil Pans 302-75

Oil Pans, Gen III Hemi, Retrofit, Non-VVT, Wet Sump, Rear, 1-piece Main Seal, 6.2 Quart, Dipstick Passenger Side, Aluminum, Natural, Hardware, Each

Part Number: HLY-302-75

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Holley Thermostat Housing Assemblies 97-169

Water Neck Thermostat Housings, Replacement, Aluminum, 1.50 in. Outlet, O-ring Seal, with Thermostat, for LT/LS Mid-Mount Accessory Drive Only, Each

Part Number: HLY-97-169

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Holley LS Engine Accessory Drive Kits 21-2

Accessory Drive Bracket Spacer Kits, Aluminum, Natural Finish, Middle Alignment, Chevy, Small Block LS, Each

Part Number: HLY-21-2

5.0 out of 5 stars ( 4 )

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Holley Mid-Mount Complete Accessory Systems 20-186P

Accessory Drive Systems, LS Mid-mount, Serpentine, Alternator, Water Pump, Counterclockwise, Power Steering, GM 2, Polished, Chevy, 4.8-7.0L, Kit

Part Number: HLY-20-186P

Not Yet Reviewed

Estimated Ship Date: Mar 5, 2026 if ordered today

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Estimated Ship Date: Mar 5, 2026 if ordered today

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March Performance Chevy LS Series Serpentine Kits 20085-08

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2003 Holley Parts and Accessories