2003 Holley Parts and Accessories

Ignition Coil Wiring Harnesses, Holley EFI, LS Coil Extension Harness, 36 in. Long, OE Connectors, Plug & Play, Techflex F6 Loom, Chevy, 4.8-70L, Pair

Part Number: HLY-558-326

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

• Free Shipping

Fuel Rails, Holley EFI, LS Fuel Rails, Aluminum, Black Finish, -8 AN O-ring Inlet, Brackets, Hardware, for 300-137 Intake, Chevy, 4.8-7.0L, Kit

Part Number: HLY-534-219

Not Yet Reviewed

Estimated Ship Date: Today

• Free Shipping

Transmission Harness, Holley EFI, Pre-terminated, Ford, 1998+, 4R70W/4R75W Transmissions, Each

Part Number: SNE-558-470

Not Yet Reviewed

Estimated Ship Date: Today

• Free Shipping

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

Not Yet Reviewed

Estimated Ship Date: Today

• Free Shipping

Intake Manifolds, Sniper EFI, Fabricated, Cathedral Port, 92mm Throttle Body, 2,200-6,800 RPM, Aluminum, Black, Chevy, LS, 4.8-6.0L, Kit

Part Number: SNE-820032-1

4.75 out of 5 stars ( 4 )

Estimated Ship Date: Today

• Free Shipping

Throttle Body, Sniper EFI, Multi-port Injection, 85mm Bore, Billet Aluminum, Black Anodized, Cable Operated, Chevy, 4.8-6.0L, Each

Part Number: SNE-860024

3.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

• Free Shipping

Ignition Coil Wiring Harnesses, Holley EFI, HP Smart Coil, Ignition Harness, for HP/Dominator ECU, Chevy, LS Based, 4.8L, 5.3L, 6.0L, 6.2L, 7.0L, Each

Part Number: HLY-558-312

4.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

• Free Shipping

Throttle Bodies, LS Style, Multi-Port Injection, Cable Actuated, 1 Venturi, 95mm, Billet Aluminum, Black Anodized, Chevy, 4.8-7.0L, LS Based, Each

Part Number: HLY-112-585

4.2 out of 5 stars ( 5 )

Estimated Ship Date: Today

• Free Shipping

Intake Manifolds, LS Modular, Ultra Lo-Ram EFI, Cathedral Port Head, Multi-port, Standard Deck, 105mm Bore, Aluminum, Silver, Chevy, 4.8-6.0L, Each

Part Number: HLY-300-621

Not Yet Reviewed

Estimated Ship Date: Today

• Free Shipping

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

Part Number: HLY-300-225

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

Throttle Cable Brackets, Throttle Body Mounting Style, Aluminum, Black Anodized, Chevy, Kit

Part Number: HLY-20-147

4.64 out of 5 stars ( 14 )

Estimated Ship Date: Today

Water Pumps, Mechanical, Standard-volume, Counterclockwise Rotation, Aluminum, Natural Finish, Forward Inlet, Mid-belt, Chevy, LS, 4.8-7.0L, Each

Part Number: HLY-22-100

4.8 out of 5 stars ( 5 )

Estimated Ship Date: Today

• Free Shipping

Intake Manifolds, Sniper EFI, Fabricated, Cathedral Port, 92mm Throttle Body, 1,800-6,400 RPM, Aluminum, Black, Chevy, LS, 4.8-6.0L, Kit

Part Number: SNE-820102-1

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

• Free Shipping

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

Part Number: SNE-850005

3.35 out of 5 stars ( 17 )

Estimated Ship Date: Today

• Free Shipping

Water Pump Housings, Holley, LS Cooling Manifold, Aluminum, Natural, Steam Tube Inlet, 1/8 in.-NPT, for Holley Mid-Mount Accessory Drive Only, Each

Part Number: HLY-97-163

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

• Free Shipping

Throttle Body Adapters, Holley, Angle Adapter, GM LS, LT, LT4 Intakes, High-Mount, 4-bolt Intake, 95mm Bore, Aluminum, Black, Chevy, 4.8-7.0L, Each

Part Number: HLY-717-15

3.67 out of 5 stars ( 3 )

Estimated Ship Date: Today

Valve Covers, LS Ford Style, Cast Aluminum, Center Bolt, Plain, Cast Aluminum, Black Finish, Two-Piece, Chevy, LS, 4.8-7.0L, Pair

Part Number: HLY-241-187

Not Yet Reviewed

Estimated Ship Date: Today

• Free Shipping

Gaskets, Plenum O-Ring Cord, 4.5 ft. Long, 3/32 in. Diameter, Hi-Ram, Chevy, LS, Each

Part Number: HLY-508-21

4.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

Air Conditioner Brackets, Passenger Side, Aluminum, Sanden 508, Sanden SD7, Chevy, Small Block LS, Each

Part Number: HLY-20-134

4.36 out of 5 stars ( 14 )

Estimated Ship Date: Today

• Free Shipping

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

Not Yet Reviewed

Estimated Ship Date: Jan 19, 2026 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Gaskets, Intake Manifold, O-ring Seals, Viton®, Stock Ports, 8-piece, Chevy, LS, 5.7L, 6.0L, Set

Part Number: HLY-508-23

4.83 out of 5 stars ( 6 )

Estimated Ship Date: Today

Valve Covers, Aluminum LS, Center and Perimeter Bolt, Tall, Chevy Logo, Cast Aluminum, Natural Finish, Two-Piece, Chevy, LS, 4.8-7.0L, Pair

Part Number: HLY-241-175

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

• Free Shipping

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

Part Number: HLY-197-302

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

• Free Shipping

Engine Management Systems, Terminator X MAX, 8-EV6 Injectors, 8-Coils, Trans Control, Analog, USB Tune Cable, Chevy, LS, 5.7L, 1x Cam, 24x Crank, Kit

Part Number: HLY-550-934T

Not Yet Reviewed

Estimated Ship Date: Today

• Free Shipping

Valve Covers, Aluminum LS, Centerbolt, Tall, Plain, Cast Aluminum, Red Powdercoat, Glossy, Chevy, LS, 4.8-7.0L, Pair

Part Number: HLY-241-113

4.44 out of 5 stars ( 16 )

Estimated Ship Date: Today

• Free Shipping