2003 Holley Parts and Accessories

Throttle Cable Brackets, Intake Manifold Mounting Style, Steel, Black, for Use On Holley Intake HLY-300-621, Chevrolet, Small Block LS, Each

Part Number: HLY-20-154

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Wiring Harnesses, Holley EFI, Ford 2V/4V Modular, Main Harness, Multi-Port Fuel Injection, for Holley Smart Coils, HP EFI System, Ford, 4.6-5.4L, Each

Part Number: HLY-558-113

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Estimated Ship Date: Jan 19, 2026 if ordered today

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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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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 )

Estimated Ship Date: Today

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

Part Number: HLY-241-111

4.55 out of 5 stars ( 11 )

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

Part Number: HLY-300-246BK

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

Part Number: HLY-300-294BK

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Estimated Ship Date: Jan 19, 2026 if ordered today

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Intake Manifold Installation, Sniper EFI, O-Ring, Gaskets, Mounting Hardware, Stock Port, Mod-Motor Manifold, Chevy, LS, 5.47L, 6.0L, Kit

Part Number: SNE-870002

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Accessory Belt Tensioners, Holley, Replacement, Tensioner Assembly, Cast Aluminum, Smooth Pulley, for LS Accessory Drives Only, GM, LS, 4.8-7.0L, Each

Part Number: HLY-97-179

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Intake Manifolds, EFI LS Fabricated, Hi-Ram, Throttle Body, Top Only, 95mm Bore, Aluminum, Black, Chevy, LS, 4.8L, 5.3L, 5.7L, 6.0L, 6.2L, 7.0L, Kit

Part Number: HLY-300-284

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

Part Number: HLY-241-298

4.5 out of 5 stars ( 2 )

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Alternators, High-amp, OE Style, Cast Aluminum, Natural Finish, Serpentine Pulley, 130 amps, 12V, Internal Regulator, Chevy, 4.8L, 5.3L, 6.0L, Each

Part Number: HLY-197-301

3.0 out of 5 stars ( 2 )

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Accessory Drive Bracket Kits, for R4 A/C Compressor, Aluminum, Black, Chevy, LS, Kit

Part Number: HLY-20-131BK

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Estimated Ship Date: Jan 19, 2026 if ordered today

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Power Steering Pulleys, Holley, Replacement, 6-groove, LS Serpentine, Press-fit, Steel, Black, 5.75 in. OD, 0.66 in. Bore, for GM Type 2 Pump, Each

Part Number: HLY-97-154

3.33 out of 5 stars ( 3 )

Estimated Ship Date: Today

Fuel Pressure Regulators, GM EFI, Inline, Stainless Body, 0.375 in. Inlet, 5/16 in. and 3/8 in. Outlets, Quick-Connect, 5 micron, Paper Filter, Each

Part Number: HLY-162-590

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Intake Manifolds, EFI, LS, Hi-Ram, Base Only, Cathedral Port, Multi-port, Standard Deck, Aluminum, Black Finish, Chevy, 4.8L, 5.3L, 5.7L, 6.0L, Each

Part Number: HLY-300-227BK

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Estimated Ship Date: Jan 15, 2026 if ordered today

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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 )

Estimated Ship Date: Today

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Valve Covers, Aluminum LS, Centerbolt, Tall, Chevrolet Logo, Cast Aluminum, Black Satin, Baffled, Chevy, LS, 4.3L, 5.3L, 5.7L, 6.0L, 6.2L, 7.0L, Pair

Part Number: HLY-241-402

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Water Pump Housings, Replacement, Cooling Manifold, Cast Aluminum, Satin Finish, for Mid-Mount Accessory System, Chevy, 4.3-6.6L, Each

Part Number: HLY-97-309

5.0 out of 5 stars ( 1 )

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

Part Number: HLY-20-166

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

Part Number: HLY-120-500

5.0 out of 5 stars ( 1 )

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Accessory Drive Bracket Spacer Kits, Aluminum, Black Finish, Long Alignment, Chevy, Small Block LS, Each

Part Number: HLY-21-3BK

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Intake Manifolds, LS Split Design, Carbureted, Cathedral Port Head, Single Plane, 4-barrel, Square Bore, Aluminum, Satin Finish, Chevy, 4.8-6.0L, Each

Part Number: HLY-300-256

4.0 out of 5 stars ( 3 )

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

Part Number: HLY-20-163BK

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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 )

Estimated Ship Date: Today

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