Engine Rotating Assemblies & Rebuild Kits

Engine Rotating Kits, Pro LS Crank and Rod Kits, Forged 4340 Steel, 6.125 in. Connecting Rod Length, 3.622 in. Stroke, Chevy, 5.3L, 5.7L, 6.0L, Kit

Part Number: SUM-CR3624125

Not Yet Reviewed

Estimated Ship Date: Today

Pro LS 4340 Piston and Rod Kit, 347 Cid., 3.903 bore, 3.622 stroke, 6.125 rod, 3cc dome, 11:1 @ 65cc, 10.6:1 @ 68cc, File-Fit Rings

Part Number: SUM-PR36L9033

Not Yet Reviewed

Estimated Ship Date: Today

• Free Shipping

Pro LS 4340 Piston and Rod Kit, 416 Cid., 4.070 bore, 4.000 stroke, 6.125 rod, 21cc dish, 9.9:1 @ 65cc, 9.5:1 @ 70cc, File-Fit Rings

Part Number: SUM-PR4007021

Not Yet Reviewed

Estimated Ship Date: Today

• Free Shipping

Pro LS Piston and Rod Kit, 371 Cid., 4.040 bore, 3.622 stroke, 6.098 rod, 2cc Flat Top, 10.9:1 @ 65cc, 10.3:1 @ 70cc, File-Fit Rings

Part Number: SUM-PR360402

Not Yet Reviewed

Estimated Ship Date: Today

• Free Shipping

BOTTOM END KIT Yamaha

Part Number: HRI-HR00124

Not Yet Reviewed

Estimated Ship Date: Mar 31, 2026 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Pro LS 4340 Piston and Rod Kit, 346 Cid., 3.898 bore, 3.622 stroke, 6.125 rod, 3cc dome, 11:1 @ 65cc, 10.6:1 @ 68cc, File-Fit Rings

Part Number: SUM-PR36L8983

Not Yet Reviewed

Estimated Ship Date: Today

• Free Shipping

Rebuild Kit, Complete Bottom End, for use on Honda®, Kit

Part Number: HRI-CBK0016

Not Yet Reviewed

Estimated Ship Date: Mar 30, 2026 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Pro LS Piston and Rod Kit, 371 Cid., 4.040 bore, 3.622 stroke, 6.125 rod, 2cc Flat Top, 10.9:1 @ 65cc, 10.3:1 @ 70cc, File-Fit Rings

Part Number: SUM-PR36L0402

Not Yet Reviewed

Estimated Ship Date: Today

• Free Shipping

Powersports Bottom End Engine Kit, HOT ROD COMPLETE BOTTOM END KT SPORTSMAN 700

Part Number: HRI-CBK0226

Not Yet Reviewed

Estimated Ship Date: Mar 31, 2026 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Rebuild Kit, Complete Bottom End, for use on Honda®, TRX450R, TRX450ER, Kit

Part Number: HRI-CBK0106

Not Yet Reviewed

Estimated Ship Date: Mar 30, 2026 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Gasket Kit HOT ROD COMP BOTTOM END KIT BA HOT ROD COMP BOTTOM END KIT BA NSHEE 350

Part Number: HRI-CBK0044

Not Yet Reviewed

Estimated Ship Date: Mar 31, 2026 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Rebuild Kit, Complete Bottom End, Kawasaki, Suzuki, Kit

Part Number: HRI-CBK0048

Not Yet Reviewed

Estimated Ship Date: Mar 30, 2026 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Gasket Kit BOTTOM END KIT BOTTOM END KIT

Part Number: HRI-CBK0092

Not Yet Reviewed

Estimated Ship Date: Mar 30, 2026 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Pro LS 4340 Piston and Rod Kit, 415 Cid., 4.065 bore, 4.000 stroke, 6.125 rod, 21cc dish, 9.9:1 @ 65cc, 9.5:1 @ 70cc, File-Fit Rings

Part Number: SUM-PR4006521

Not Yet Reviewed

Estimated Ship Date: Today

• Free Shipping

Pro LS 4340 Piston and Rod Kit, 383 Cid., 3.903 bore, 4.000 stroke, 6.125 rod, 5cc dish, 10.9:1 @ 65cc, 10.6:1 @ 68cc, File-Fit Rings

Part Number: SUM-PR409035

Not Yet Reviewed

Estimated Ship Date: Today

• Free Shipping

Rebuild Kit, Complete Bottom End, Yamaha, YFZ 350 Banshee, Kit

Part Number: HRI-CBK0039

Not Yet Reviewed

Estimated Ship Date: Mar 31, 2026 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Rebuild Kit, Complete Bottom End, Yamaha, YZ85, Kit

Part Number: HRI-CBK0076

Not Yet Reviewed

Estimated Ship Date: Mar 31, 2026 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Pro LS 4340 Piston and Rod Kit, 367 Cid., 3.820 bore, 4.000 stroke, 6.125 rod, 5cc dish, 11:1 @ 61cc, 10.5:1 @ 65cc, File-Fit Rings

Part Number: SUM-PR408205

Not Yet Reviewed

Estimated Ship Date: Today

• Free Shipping

Rebuild Kit, Complete Bottom End, Yamaha, YFM700, YXR700F, Kit

Part Number: HRI-CBK0115

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Mar 30, 2026 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Engine Rotating Kits, Pro LS Crank and Rod Kits, Forged 4340 Steel, 6.098 in. Connecting Rod Length, 4.000 in. Stroke, Chevy, 5.3L, 5.7L, 6.0L, Kit

Part Number: SUM-CR4024098

Not Yet Reviewed

Estimated Ship Date: Today

COMPLETE BOTTOM END KIT

Part Number: HRI-CBK0190

Not Yet Reviewed

Estimated Ship Date: Mar 31, 2026 if ordered today

• Drop Ship
• Free Shipping
• Special Order

COMPLETE BOTTOM END KT

Part Number: HRI-CBK0191

Not Yet Reviewed

Estimated Ship Date: Mar 30, 2026 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Rebuild Kit, Complete Bottom End, KTM, 65 SX, 65 XC, Kit

Part Number: HRI-CBK0073

Not Yet Reviewed

Estimated Ship Date: Mar 31, 2026 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Rebuild Kit, Complete Bottom End, Suzuki, Kit

Part Number: HRI-CBK0225

Not Yet Reviewed

Estimated Ship Date: Mar 31, 2026 if ordered today

• Drop Ship
• Free Shipping
• Special Order

Pro LS 4340 Piston and Rod Kit, 365 Cid., 4.005 bore, 3.622 stroke, 6.098 rod, 12cc dish, 9.6:1 @ 65cc, 9.2:1 @ 70cc, File-Fit Rings

Part Number: SUM-PR3600512

Not Yet Reviewed

Estimated Ship Date: Today

• Free Shipping