JR Race Car Engines & Components

ZR 4 1.750 TI INT VALVE 1/4 STEM

Part Number: JRC-ZRC-4205

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Estimated Ship Date: Dec 15, 2025 if ordered today

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ZR 4 1.875 TI INT VALVE 1/4 STEM

Part Number: JRC-ZRC-4210

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Estimated Ship Date: Dec 15, 2025 if ordered today

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ZR 4 CAMSHAFT 128

Part Number: JRC-ZRC-4ZR128

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ZR 4 CAMSHAFT 129

Part Number: JRC-ZRC-4ZR129

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ZR 2/3 CAMSHAFT 121

Part Number: JRC-ZRC-5ZR121

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ZR 2/3 CAMSHAFT 123

Part Number: JRC-ZRC-5ZR123

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ZR 4 HEAD STUD KIT

Part Number: JRC-322-2510

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HEAD STUD KIT W/ O-RING

Part Number: JRC-322-3458

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HEAD STUD KIT W/O O-RING

Part Number: JRC-322-3459

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Estimated Ship Date: Dec 15, 2025 if ordered today

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HEAD STUD O-RING KIT

Part Number: JRC-322-3571

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Estimated Ship Date: Dec 15, 2025 if ordered today

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HEAD STUD SPACER & O-RING KIT

Part Number: JRC-322-3572

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ZR 4 CAMSHAFT 131

Part Number: JRC-ZRC-4ZR131

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Connecting Rod, ARC Stroker, I-beam, T-651 Billet Aluminum, Polished, 4.625 in, Jr Dragster Engines Only, Each

Part Number: JRC-685-6365

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Connecting Rod, ARC Stroker, I-beam, T-651 Billet Aluminum, Polished, 4.475 in, Jr Dragster Engines Only, Each

Part Number: JRC-685-6217

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ZR 2/3 CAMSHAFT 127

Part Number: JRC-ZRC-5ZR127

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Piston and Rings, Cast Aluminum, Flat Top, 2.702 in. Bore, Kit

Part Number: JRC-954-1409

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3.738 BLANK

Part Number: JRC-954-37389

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Connecting Rod, ARC Stroker, I-beam, T-651 Billet Aluminum, Polished, 4.425 in, Jr Dragster Engines Only, Each

Part Number: JRC-685-6216

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JR 4.500" 1" .490" STROKER ROD

Part Number: JRC-55745001004

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.Piston Rings, 2.717 in. Bore, Jr. Race Car, Set

Part Number: JRC-952-2717XM

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Estimated Ship Date: Nov 28, 2025 if ordered today

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POLAR BELT .850 WIDE

Part Number: JRC-323-PLRWIDE

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Estimated Ship Date: Dec 15, 2025 if ordered today

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ZR4 BREATHER

Part Number: JRC-ZRC-3005

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Estimated Ship Date: Dec 15, 2025 if ordered today

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2.992 BLANK

Part Number: JRC-954-29929

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JR 4.225 7/8 .490 STROKER ENDURO ROD

Part Number: JRC-557-4225-875

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Estimated Ship Date: Dec 15, 2025 if ordered today

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2.592 .030 OVER PISTON KIT

Part Number: JRC-954-0309

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