Summit Racing Engines & Components

Chevy LS 4340 Forged Steel Crankshaft, 4.000 stroke, 24X Reluctor, Lightened, Nitride Hardened, Narrowed Rod Bearings Req.

Part Number: SUM-180LS400024

3.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 1/5/2026

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Pro SBC Stage 6 Hyd. Flat-Tappet 4/7 Firing Order Swap Cam, 242/248 Dur., 108 LSA + 2 Adv, .510/.518 1.5 Ratio, .544/.553 1.6 Ratio, 2600-6600 Range

Part Number: SUM-1205

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 1/5/2026

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Pro SBC Stage 8 Hyd.Flat-Tappet 4/7 Firing Order Swap Cam, 252/258 Dur., 107 LSA + 1.5 Adv, .533/.540 1.5 Ratio, .569/.576 1.6 Ratio, 3200-7200 Range

Part Number: SUM-1207

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Estimated Ship Date: Monday 1/5/2026

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Forged Pro SBC 4340 Forged Steel H-Beam Connecting Rods, 5.700 in. Length, .927 Floating Pin, ARP L19- 260K PSI 7/16 in. 12 pt. Bolts, Set of 8

Part Number: SUM-SBC570019H

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Estimated Ship Date: Monday 1/5/2026

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Pro SBC Hyd. Roller Cam, Turbo Stage 3, 232/232 Duration, 115 LSA + 5 Adv., .550/550 Lift with 1.5 Ratio, .587/.587 1.6 Ratio, 3500-7200 Rpm Range

Part Number: SUM-8807

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Camshaft, Duramax Pro 1 Cam, 184/187 Duration @.050 in., 105.5 LSA, +2 advanced., Intake .389/Exhaust .392 Lift, Revised Firing Order, Each

Part Number: SUM-9001R1

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Pro SBC Stage 7 Hyd. Flat-Tappet 4/7 Firing Order Swap Cam, 248/256 Dur., 108 LSA + 2 Adv, .518/.525 1.5 Ratio, .553/.560 1.6 Ratio, 3000-7000 Range

Part Number: SUM-1206

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 1/5/2026

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Gen. 1.5 LT1 Forged Steel Crankshaft, 3.750 stroke, 5.700 Rod, Lightened, bull-nose counterweights, Nitride Hardened, 1 piece rear main seal

Part Number: SUM-SBCLT37501P

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Estimated Ship Date: Monday 1/5/2026

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Mockup Block, Cummins 4BT, Long Block, Steel, Includes bolts, Each

Part Number: SUM-774006

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Estimated Ship Date: Monday 1/5/2026

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Camshaft, Duramax Pro 2 Cam, 187/189 Duration @.050 in., 106.5 LSA, +2 advanced, Intake .389/Exhaust .392 Lift, Revised Firing Order, Each

Part Number: SUM-9002R1

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Camshaft, Duramax Pro 3 Cam, 190/193 Duration @.050 in., 108.5 LSA, +2 advanced, Intake .389/Exhaust .392 Lift, Revised Firing Order, Each

Part Number: SUM-9003R1

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