2003 Parts and Accessories

Cylinder Head, GenX® 280 HIP, CNC Competition Ported, Assembled, 280cc Ports, Titanium Retainers, 6-Bolt Pattern, GM LS3, LSX, Each

Part Number: TFS-3261T04-HC01

Not Yet Reviewed

Estimated Ship Date: Monday 2/16/2026 if shipped by air

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Differential, Eaton Detroit Truetrac, Limited Slip, 30-Spline, 3.73:1 and Down Only, Dana 44, Each

Part Number: ETN-913A589

4.78 out of 5 stars ( 9 )

Estimated Ship Date: Monday 2/16/2026 if shipped by air

• Free Shipping
• $75 Summit Bucks

Gear, Ring and Pinion, 3.73:1 Ratio, Ford, 8.8 in., Set

Part Number: FMS-M-4209-88373

4.85 out of 5 stars ( 48 )

Estimated Ship Date: Monday 2/16/2026 if shipped by air

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Battery, Dry Cell, 12 V, Deep Cycle/Starting, 850 Cold Cranking Amps, Top/Side Posts, 34/78 Group, Each

Part Number: ODY-3478PC1500DT

4.84 out of 5 stars ( 31 )

Cannot be shipped Internationally if shipped by air

• Restricted
• Free Shipping

Differential, Eaton Detroit Truetrac, 30-Spline, GM, 10.5 in. Ring Gear, 4.10 and Lower Ratios, Each

Part Number: ETN-915A545

4.62 out of 5 stars ( 13 )

Estimated Ship Date: Monday 2/16/2026 if shipped by air

• Free Shipping
• $75 Summit Bucks

Spark Plug, Copper, 14mm Thread, 0.750 in. Reach, Gasket Seat, 5/8 in. Wrench Size, Each

Part Number: ATL-3924

4.83 out of 5 stars ( 63 )

Estimated Ship Date: Monday 2/16/2026 if shipped by air

Pro LS Piston and Rod Kit, 325 Cid., 3.780 bore, Standard 3.622 stroke, 6.098 rod, 7cc dish, 9.7:1 @ 61cc, 9.3:1 @ 65cc, File-Fit Rings

Part Number: SUM-PR367807

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 2/16/2026 if shipped by air

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Connecting Rods, FSI I-Beam, Forged 4340 Steel, Shot-Peened, Floating, 6.125 in. Long, GM LS, Set of 8

Part Number: ESP-FSI6125O

4.88 out of 5 stars ( 8 )

Estimated Ship Date: Monday 2/16/2026 if shipped by air

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Shock, 5100 Series, Monotube, Rear, Chevy, GMC, Dodge, Hummer, 4WD, Each

Part Number: BSN-24-191203

4.92 out of 5 stars ( 73 )

Estimated Ship Date: Monday 2/16/2026 if shipped by air

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Pro LS 2618 Forged Piston, 4.030 bore, 1.299 C.H., 2cc Flat, Std. Stroke, 6.125 .927 Rod, NA/Boost/Nitrous, Cathedral/Rect. 6.0L LY6 LQ4 LQ9, Set of 8

Part Number: SUM-2999274030-2

5.0 out of 5 stars ( 6 )

Estimated Ship Date: Monday 2/16/2026 if shipped by air

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Clutch Kit, RST Street Twin, 1 1/8 in. x 26-Spline, 9.687 in. Diameter, LS1/LS6/Mustang 11 in. Pressure Plate Pattern w/Dowels, Chevy, Ford, Kit

Part Number: MCL-6912-07

4.0 out of 5 stars ( 10 )

Estimated Ship Date: Monday 2/16/2026 if shipped by air

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Disc Brake, Big Brake, Front, Drilled/Slotted Rotors, 6-piston Caliper, Black, Buick, Chevy, GMC, Olds Pontiac

Part Number: WIL-140-12837-D

4.25 out of 5 stars ( 4 )

Estimated Ship Date: Monday 2/16/2026 if shipped by air

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Engine Gasket Sets, Full, Cadillac, Chevy, GMC, Hummer, 6.0L, Kit

Part Number: FEL-260-1955

3.33 out of 5 stars ( 3 )

Estimated Ship Date: Monday 2/16/2026 if shipped by air

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Wiring Harness, Fuel Injection, for Engine Swaps, Multi-Port, Mass Airflow, with 10 Circuit Fuse Block/GM Colors, Chevy, LS 4.8, 5.3, 6.0L, Each

Part Number: PRF-60217

4.69 out of 5 stars ( 16 )

Estimated Ship Date: Monday 2/16/2026 if shipped by air

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Headlight Assembly, High/Low, H4 Led Bulb Conversion, 5.75 in, Clear Glass Lens, Black Housing, Round, Pls See Instructions On Boot Installation, Pair

Part Number: SUM-RP22672

3.71 out of 5 stars ( 17 )

Estimated Ship Date: Monday 2/16/2026 if shipped by air

Gear Lube, Synthetic Gear Lubricant LS, 75W90, 1 qt., Synthetic, Each

Part Number: MOB-104361-1

5.0 out of 5 stars ( 32 )

Cannot be shipped Internationally if shipped by air

• Restricted

Ignition Coils, Coil Pack, Epoxy, Square, Red, LS, V8,GM, Set of 8

Part Number: XPF-ZZ-HVCPLSSQ8

4.86 out of 5 stars ( 7 )

Estimated Ship Date: Monday 2/16/2026 if shipped by air

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Transmission Dipstick, Braided Stainless Steel, Black, Firewall Mount, Chevy, 4L80E, Each

Part Number: LOK-XTD-34L80FM

4.5 out of 5 stars ( 8 )

Estimated Ship Date: Monday 2/16/2026 if shipped by air

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Oil Filter Relocation Kit, Single Filter, 96 in. Hose Length, Kit

Part Number: SUM-G4985-1

3.86 out of 5 stars ( 155 )

Estimated Ship Date: Monday 2/16/2026 if shipped by air

Alternator and Power Steering Brackets, Driver Side, Alternator Upper Mount, Power Steering Lower Mount, Billet Aluminum, Chevy, LS, Kit

Part Number: ICB-551519X-3

5.0 out of 5 stars ( 9 )

Estimated Ship Date: Monday 2/16/2026 if shipped by air

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Cylinder Head Studs, Custom Age, 12-Point Head, Dodge, Cummins Diesel, 24 Valve, Kit

Part Number: ARP-247-4204

4.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 2/16/2026 if shipped by air

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Tire, Street Comp, 295/35-18, Radial, 99 Load Range, Y Speed Rated, Blackwall, Each

Part Number: MTT-6289

4.92 out of 5 stars ( 12 )

Estimated Ship Date: Monday 2/16/2026 if shipped by air

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LS Cylinder Head, 5.3L Specific, 60cc Chamber, 2.000 Int. Valve, Permanent Mold A-356, Manganese Guides, Ductile Seats, PAC Springs, 21 4N Stainless

Part Number: SUM-LS210CATH60

Not Yet Reviewed

Estimated Ship Date: Monday 2/16/2026 if shipped by air

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Cylinder Head, Performer RPM, Aluminum, Assembled, 58cc, 176cc Intake Runner, Dodge, Jeep, 5.2, 5.9L, Each

Part Number: EDL-61775

4.6 out of 5 stars ( 5 )

Estimated Ship Date: Monday 2/16/2026 if shipped by air

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Radiator, Performance, Crossflow, Upper Left Inlet/Lower Right Outlet, 34 in. x 17 in. x 2 in. Core, Aluminum, Cadillac, Chevy, GMC, Hummer, Each

Part Number: MIO-MMRAD-GMT-99

4.41 out of 5 stars ( 22 )

Estimated Ship Date: Monday 2/16/2026 if shipped by air

• Free Shipping