2003 Holley Parts and Accessories

Fuel Pressure Regulators, GM EFI, Inline, Steel Body, -6 AN Inlet/Dual Outlet, Male Threads, 5 micron, Paper Filter, Each

Part Number: HLY-162-591

3.45 out of 5 stars ( 11 )

Estimated Ship Date: Today

Fuel Rails, Holley EFI, Billet Aluminum, Black Anodized, -8 AN, O-ring Inlet, Fittings, Hardware Included, Chevy, LS, 4.8-7.0L,Kit

Part Number: HLY-534-244

4.5 out of 5 stars ( 4 )

Estimated Ship Date: Today

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Wiring Harnesses, Holley EFI, Replacement, LS1/6, 24X/1X Main Harness, Mass Airflow Metered, for HP, Dominator, EFI Systems Only, Chevy, 5.7L, Each

Part Number: HLY-558-102

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Today

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

Part Number: HLY-241-179

4.33 out of 5 stars ( 3 )

Estimated Ship Date: Today

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

Part Number: HLY-241-178

3.6 out of 5 stars ( 5 )

Estimated Ship Date: Today

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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

Not Yet Reviewed

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Harness Adaptors, Holley EFI, LS3 MAP Sensor Adapter, Plug-and-Play, Pre-Terminated, Adapts to LS1/LS2 Engine, Chevy, 5.7L, 6.0L, Each

Part Number: HLY-558-416

4.89 out of 5 stars ( 18 )

Estimated Ship Date: Today

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

Part Number: HLY-241-112

4.53 out of 5 stars ( 17 )

Estimated Ship Date: Today

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

Part Number: HLY-300-621BK

4.75 out of 5 stars ( 4 )

Estimated Ship Date: Today

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Throttle Body, Sniper EFI, Multi-port Injection, 102mm Bore, Billet Aluminum, Black Anodized, Hardware, Cable Operated, Chevy, LS, 4.8-7.0L, Each

Part Number: SNE-860005-1

3.42 out of 5 stars ( 12 )

Estimated Ship Date: Today

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Engine Management Systems, Terminator X MAX, 8-Injectors, 8-Coil, Sensors, Trans and Tuner Controller, Chevy, LS, 4.8-6.0L, 1x Cam, 24x Crank, Kit

Part Number: HLY-550-917-6

Not Yet Reviewed

Estimated Ship Date: May 18, 2026 if ordered today

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

Part Number: HLY-241-91

4.55 out of 5 stars ( 33 )

Estimated Ship Date: Today

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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

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Engine Management Systems, Terminator X MAX, 8-EV6 Injectors, 8-Coils, Plug-and-Play, Drive-by-Wire, Tuner/Trans Control, 4R70W, Ford, 4.6L, 5.4L, Kit

Part Number: HLY-550-1317

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Oil Pans, Retrofit, LS Engine Swap, Rear Sump, Wet Style, 5.6 Quarts, Aluminum, Natural, Buick, Chevy, Ford, GMC, Mercury, Oldsmobile, Pontiac, Each

Part Number: HLY-302-5

3.67 out of 5 stars ( 3 )

Estimated Ship Date: Today

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Intake Manifolds, LS Mid-Rise, Standard Deck, Single Carburetor, Single Plane, 2,500-7,000 RPM Range, Aluminum, Satin Finish, Chevy, 4.8-6.0L, Each

Part Number: HLY-300-132

4.72 out of 5 stars ( 18 )

Estimated Ship Date: Today

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Intake Manifolds, EFI, LS Hi-Ram, Cathedral Port Head, Multi-port, 105mm Bore, Standard Deck, Aluminum, Satin Finish, Chevy, 4.8-6.0L, Each

Part Number: HLY-300-123

4.0 out of 5 stars ( 5 )

Estimated Ship Date: Today

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Oil Pans, Retrofit, LS Engine Swap, Rear Sump, Wet Style, 5.9 Quarts, Aluminum, Black, Buick, Chevy, Ford, GMC, Mercury, Oldsmobile,Pontiac, Each

Part Number: HLY-302-3BK

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

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Engine Management Systems, Terminator X MAX, 8-EV1 Injectors, 8-Coil, Sensors, Trans and Tuner Controller, Chevy, LS, 5.7L, 1x Cam, 24x Crank, Kit

Part Number: HLY-550-926

4.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

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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-550-650

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

Part Number: HLY-241-176

3.83 out of 5 stars ( 6 )

Estimated Ship Date: Today

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

Part Number: HLY-300-620BK

Not Yet Reviewed

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

Part Number: HLY-197-303

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Fuel Rails, Holley EFI, LS Hi-Flow, Aluminum, Black Finish, -8 AN O-ring Inlet, Brackets, Fittings, Hardware, for Stock Intake, Chevy, 4.8-6.2L, Kit

Part Number: HLY-534-209

4.25 out of 5 stars ( 32 )

Estimated Ship Date: Today

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Engine Management Systems, Terminator X, Up to 8-Injectors, 8-Coils, Analog, CANBUS, Sensors, USB Tuning Cable, Chevy, 5.7L, 1x Cam, 24x Crank, Kit

Part Number: HLY-550-903T

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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