Engine Kits & Rotating Assemblies

Pro LS 4340 Rotating Assembly, 371 Cid., 4.040 bore, 3.622 stroke, 58x, 6.098 rod, 12cc dish, 9.8:1 @ 65cc, 9.3:1 @ 70cc, File-Fit Rings, H Bearings

Part Number: SUM-R583604012

Not Yet Reviewed

Estimated Ship Date: Monday 10/26/2026 if shipped by air

Forged Rotating Assembly, 6.0L/371Cid, 4.040 Bore, 3.622 Stroke, 6.098 in. Rod, Piston -8cc Dome, Steel Rings+Race Bearings -Coated/GP Rings opt..

Part Number: SUM-RALS60020

Not Yet Reviewed

Estimated Ship Date: Today

Forged Rotating Assembly, 6.0L/364Cid, 4.000 Bore, 3.622 Stroke, 6.098 in. Rod, Piston 12cc Dish, Steel Rings+Race Bearings -Coated/GP Rings opt..

Part Number: SUM-RALS60005

Not Yet Reviewed

Estimated Ship Date: Nov 27, 2026

Forged Rotating Assembly, 6.0L/364Cid, 4.000 Bore, 3.622 Stroke, 6.098 in. Rod, Piston 3cc, Steel Rings+Race Bearings -Coated/GP Rings opt..

Part Number: SUM-RALS60038

Not Yet Reviewed

Estimated Ship Date: Nov 27, 2026

Forged Rotating Assembly, 6.7L/410Cid, 4.040 Bore, 4.000 Stroke, 6.125 in. Rod, Piston 20cc Dish, Steel Rings+Race Bearings -Coated/GP Rings opt..

Part Number: SUM-RALS60099

Not Yet Reviewed

Estimated Ship Date: Nov 27, 2026

Forged Rotating Assembly, 6.0L/371Cid, 4.040 Bore, 3.622 Stroke, 6.098 in. Rod, Piston 12cc Dish, Steel Rings+Race Bearings -Coated/GP Rings opt..

Part Number: SUM-RALS60029

Not Yet Reviewed

Estimated Ship Date: Today

Forged Rotating Assembly, 6.0L/364Cid, 4.000 Bore, 3.622 Stroke, 6.098 in. Rod, Piston 12cc Dish, Steel Rings+Race Bearings -Coated/GP Rings opt..

Part Number: SUM-RALS60026

Not Yet Reviewed

Estimated Ship Date: Today

Forged Rotating Assembly, 6.0L/365Cid, 4.005 Bore, 3.622 Stroke, 6.098 in. Rod, Piston 3cc, Steel Rings+Race Bearings -Coated/GP Rings opt..

Part Number: SUM-RALS60014

Not Yet Reviewed

Estimated Ship Date: Nov 27, 2026

Forged Rotating Assembly, 6.6L/402Cid, 4.000 Bore, 4.000 Stroke, 6.125 in. Rod, Piston 9cc Dish, Steel Rings+Race Bearings -Coated/GP Rings opt..

Part Number: SUM-RALS60100

Not Yet Reviewed

Estimated Ship Date: Today

Forged Rotating Assembly, 6.7L/408Cid, 4.030 Bore, 4.000 Stroke, 6.125 in. Rod, Piston 20cc Dish, Steel Rings+Race Bearings -Coated/GP Rings opt..

Part Number: SUM-RALS60069

Not Yet Reviewed

Estimated Ship Date: Today

Forged Rotating Assembly, 6.7L/410Cid, 4.040 Bore, 4.000 Stroke, 6.125 in. Rod, Piston 20cc Dish, Steel Rings+Race Bearings -Coated/GP Rings opt..

Part Number: SUM-RALS60074

Not Yet Reviewed

Estimated Ship Date: Nov 27, 2026

Forged Rotating Assembly, 6.0L/365Cid, 4.005 Bore, 3.622 Stroke, 6.098 in. Rod, Piston 12cc Dish, Steel Rings+Race Bearings -Coated/GP Rings opt..

Part Number: SUM-RALS60002

Not Yet Reviewed

Estimated Ship Date: Today

Forged Rotating Assembly, 6.6L/402Cid, 4.000 Bore, 4.000 Stroke, 6.125 in. Rod, Piston 20cc Dish, Steel Rings+Race Bearings -Coated/GP Rings opt..

Part Number: SUM-RALS60096

Not Yet Reviewed

Estimated Ship Date: Nov 27, 2026

Forged Rotating Assembly, 6.3L/388Cid, 4.000 Bore, 3.858 Stroke, 6.125 in. Rod, Piston 16cc Dish, Steel Rings+Race Bearings -Coated/GP Rings opt..

Part Number: SUM-RALS60051

Not Yet Reviewed

Estimated Ship Date: Dec 14, 2026 if shipped by air

Forged Rotating Assembly, 6.0L/370Cid, 4.030 Bore, 3.622 Stroke, 6.098 in. Rod, Piston -8cc Dome, Steel Rings+Race Bearings -Coated/GP Rings opt..

Part Number: SUM-RALS60023

Not Yet Reviewed

Estimated Ship Date: Nov 27, 2026

Forged Rotating Assembly, 6.3L/389Cid, 4.005 Bore, 3.858 Stroke, 6.125 in. Rod, Piston 3cc, Steel Rings+Race Bearings -Coated/GP Rings opt..

Part Number: SUM-RALS60060

Not Yet Reviewed

Estimated Ship Date: Dec 14, 2026 if shipped by air

Forged Rotating Assembly, 6.0L/365Cid, 4.005 Bore, 3.622 Stroke, 6.098 in. Rod, Piston -8cc Dome, Steel Rings+Race Bearings -Coated/GP Rings opt..

Part Number: SUM-RALS60022

Not Yet Reviewed

Estimated Ship Date: Nov 27, 2026

Forged Rotating Assembly, 6.4L/403Cid, 4.005 Bore, 4.000 Stroke, 6.125 in. Rod, Piston -1cc Dome, Steel Rings+Race Bearings -Coated/GP Rings opt..

Part Number: SUM-RALS60113

Not Yet Reviewed

Estimated Ship Date: Nov 27, 2026

Forged Rotating Assembly, 6.0L/371Cid, 4.040 Bore, 3.622 Stroke, 6.098 in. Rod, Piston 12cc Dish, Steel Rings+Race Bearings -Coated/GP Rings opt..

Part Number: SUM-RALS60008

Not Yet Reviewed

Estimated Ship Date: Nov 27, 2026

Forged Rotating Assembly, 6.4L/403Cid, 4.005 Bore, 4.000 Stroke, 6.125 in. Rod, Piston 9cc Dish, Steel Rings+Race Bearings -Coated/GP Rings opt..

Part Number: SUM-RALS60080

Not Yet Reviewed

Estimated Ship Date: Nov 27, 2026

Pro LS 4340 Rotating Assembly, 367 Cid., 3.820 bore, 4.000 stroke, 58x, 6.125 rod, 5cc dish, 11:1 @ 61cc, 10.5:1 @ 65cc, File-Fit Rings, H Bearings

Part Number: SUM-R58408205

Not Yet Reviewed

Estimated Ship Date: Dec 7, 2026 if shipped by air

Pro LS 4340 Rotating Assembly, 377 Cid., 4.070 bore, 3.622 stroke, 24X, 6.125 rod, 2cc dome, 11.6:1 @ 65cc, 10.9:1 @ 70cc, File-Fit Rings, H Bearings

Part Number: SUM-R2436L0702

Not Yet Reviewed

Estimated Ship Date: Oct 30, 2026

Pro LS 4340 Rotating Assembly, 410 Cid., 4.040 bore, 4.000 stroke, 24X, 6.125 rod, 20cc dish, 9.8:1 @ 65cc, 9.4:1 @ 70cc, File-Fit Rings, H Bearings

Part Number: SUM-R244004020

Not Yet Reviewed

Estimated Ship Date: Oct 30, 2026

Pro LS Rotating Assembly, 371 Cid., 4.040 bore, 3.622 stroke, 58x, 6.125 rod, 2cc Flat Top, 10.9:1 @ 65cc, 10.3:1 @ 70cc, File-Fit Rings, H Bearings

Part Number: SUM-R5836L0402

Not Yet Reviewed

Estimated Ship Date: Oct 30, 2026

Pro LS Rotating Assembly, 332 Cid., 3.820 bore, Standard 3.622 stroke, 58x, 6.125 rod, 2cc dome, 11:1 @ 61cc, 10.5:1 @ 65cc, File-Fit Rings, H Bearing

Part Number: SUM-R5836L8202

Not Yet Reviewed

Estimated Ship Date: Oct 30, 2026