Filters
Crankshaft, Magnum, 2-piece Rear Main Seal Style, Internal Engine Balance, Forged 4340 Steel, 4.500 in. Stroke, Standard Snout, Chevrolet, 7.4L, Each
Part Number: CPI-BBQ42B-MG
Not Yet Reviewed
Estimated Ship Date: Jul 14, 2025 if ordered today
Estimated Ship Date: Jul 14, 2025 if ordered today
Crankshaft, 2-piece Seal, Internal Balance, Forged 4340 Steel, 4.750 in. Stroke, 2.200 in. Pin, Chevy, 454
Part Number: CPI-BBS42B-MG
Not Yet Reviewed
Crank, 2-piece Seal, Internal Balance, Forged 4340 Steel, 3.750 in. Stroke, 2.100 in. Pin, Chevy, 350, BB Post
Part Number: CPI-SMJ11A-MG
Not Yet Reviewed
Estimated Ship Date: Jul 22, 2025 if ordered today
Estimated Ship Date: Jul 22, 2025 if ordered today
Crankshaft, 2-piece Seal, Internal Balance, Forged 4340 Steel, 4.250 in. Stroke, 2.200 in. Pin, Chevy, 454
Part Number: CPI-BBP42B-MG
Estimated Ship Date: Jun 30, 2025 if ordered today
Estimated Ship Date: Jun 30, 2025 if ordered today
Need It Sooner?
We recommend these similar substitute parts:
Crankshaft, Forged 4340 Steel, 3.625 in. Stroke, Internal Balance, 6 Bolt, 58-tooth GM Reluctor, Standard Snout, Chevy, Small Block, LS, Each
Part Number: CPI-APH-31V-AS
Not Yet Reviewed
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Crankshaft, Forged 4340 Steel, 4.000 in. Stroke, Internal Balance, 6 Bolt, 58-tooth GM Reluctor, Standard Snout, Chevy, Small Block, LS, Each
Part Number: CPI-APO-31V-AS
Not Yet Reviewed
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Crankshafts, Magnum, 4340 Steel, 4.00 in. Stroke, Internal Balance, 58X Reluctor, 1-Piece Main, 2.10 in. Diameter Journal, Lightened, Chevy, LS, Each
Part Number: CPI-APO31V-MG
Not Yet Reviewed
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Crankshaft, 2-piece Seal, Internal Balance, Forged 4340 Steel, Big Block Chevy Snout, 4.125 in. Stroke, 2.100 in. Pin, Chevy, 400, Each
Part Number: CPI-SMU21A-MG
Not Yet Reviewed
Estimated Ship Date: May 20, 2025 if ordered today
Estimated Ship Date: May 20, 2025 if ordered today
Crankshaft, Magnum, 2-Piece Seal, Forged 4340 Steel, 4.000 in. Stroke, 6.000 in. Rods, 2.100 Pin, 350 Main, Big Block Post, Chevy, Small Block, Each
Part Number: CPI-SMO11A-MG
Not Yet Reviewed
Estimated Ship Date: Jul 21, 2025 if ordered today
Estimated Ship Date: Jul 21, 2025 if ordered today
Crankshaft, Magnum, 2-piece Seal, Internal Balance, Forged 4340 Steel, 3.750 in. Stroke, Chevrolet, Each
Part Number: CPI-BBJ42B-MG
Not Yet Reviewed
Crankshaft, 2-piece seal, Internal balance, Forged 4340 Steel, 4.000 in. Stroke, Chevy, 400, 2.100 Pin, Each
Part Number: CPI-SAO21A-MG
Not Yet Reviewed
Estimated Ship Date: Jul 24, 2025 if ordered today
Estimated Ship Date: Jul 24, 2025 if ordered today
Crankshaft, 2-piece seal, Internal balance, Forged 4340 Steel, 3.480 in. Stroke, Chevy, 350, 2.100 Pin, Each
Part Number: CPI-SAF11A-MG
Not Yet Reviewed
Estimated Ship Date: Jul 1, 2025 if ordered today
Estimated Ship Date: Jul 1, 2025 if ordered today
4340 Forged Superlight
Part Number: SCA-445426C-3
Not Yet Reviewed
Estimated Ship Date: Jul 8, 2025 if ordered today
Estimated Ship Date: Jul 8, 2025 if ordered today
4340 Forged Superlight
Part Number: SCA-445430C-3
Not Yet Reviewed
Estimated Ship Date: Jul 8, 2025 if ordered today
Estimated Ship Date: Jul 8, 2025 if ordered today
4340 Forged Pro Series Big Block Post
Part Number: SCA-773505621
Not Yet Reviewed
Estimated Ship Date: Jul 8, 2025 if ordered today
Estimated Ship Date: Jul 8, 2025 if ordered today
4340 Forged Pro Series Lightweight
Part Number: SCA-445430C-2
Not Yet Reviewed
Estimated Ship Date: Jul 8, 2025 if ordered today
Estimated Ship Date: Jul 8, 2025 if ordered today
350 1-PC REAR SEAL SUPERLIGHT
Part Number: SCA-435010L-3
Not Yet Reviewed
Estimated Ship Date: Jul 8, 2025 if ordered today
Estimated Ship Date: Jul 8, 2025 if ordered today
4340 Forged Superlight
Part Number: SCA-435028-3
Not Yet Reviewed
Estimated Ship Date: Jul 8, 2025 if ordered today
Estimated Ship Date: Jul 8, 2025 if ordered today
Crankshaft, Forged 4340 Steel, 4.000 in. Stroke, Internal Balance, 8 Bolt, 58-tooth GM Reluctor, Dry Sump Post, Standard Snout, Chevy, Gen V, Each
Part Number: CPI-5UO-31V-AS
Not Yet Reviewed
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Crankshaft, Forged 4340 Steel, 4.125 in. Stroke, Internal Balance, 6 Bolt, 58-tooth GM Reluctor, Standard Snout, Chevy, Small Block, LS, Each
Part Number: CPI-APU-31V-AS
Not Yet Reviewed
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
350 1-PC REAR SEAL PROCOMP LIGHTWEIGHT
Part Number: SCA-435010L-2
Not Yet Reviewed
Estimated Ship Date: Jul 8, 2025 if ordered today
Estimated Ship Date: Jul 8, 2025 if ordered today
Crankshaft, Forged 4340 Steel, 4.000 in. Stroke, Internal Balance, 8 Bolt, 58-tooth GM Reluctor, Wet Sump Post, Standard Snout, Chevy, Gen V, Each
Part Number: CPI-5TO-31V-AS
Not Yet Reviewed
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Crankshaft, Forged 4340 Steel, 4.250 in. Stroke, Internal Balance, 6 Bolt, 58-tooth GM Reluctor, Standard Snout, Chevy, Small Block, LS, Each
Part Number: CPI-APP-31V-AS
Not Yet Reviewed
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Crankshaft, Forged 4340 Steel, 4.000 in. Stroke, Internal Balance, 6 Bolt, 58-tooth GM Reluctor, Long Snout, Chevy, Small Block, LS7, Each
Part Number: CPI-AWO-31V-AS
Not Yet Reviewed
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
4340 Forged Pro Series Lightweight
Part Number: SCA-445425C-2
Not Yet Reviewed
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Modal Header
Call To Order
This is a custom order part. You can order this part by Contacting Us.
Truck / SUV
Jeep®
Restoration
Stock Replacement
Late Model Muscle
Tools
Gifts, Clothing, & More
Circle Track
Street Rod
Powersports
Paint & Body
Marine
Jr Dragster
