Unsurpassed quality and exceptional strength at an affordable price. Cranks begin as non-twist 4340 forgings which are ground, cross-drilled, stress-relieved, shot-peened, micro-polished and nitrided during the manufacturing process. Rod journals are indexed for correct stroke, and the crankshaft is inspected for proper dimensions. It is then micro-polished, X-rayed, magnafluxed, and sonic tested prior to shipping.
Proposition 65 Warning:
This product may contain chemicals known to the state of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.
- Rear Main Seal Style:
- 2-piece
- Engine Stroke (in.):
- 4.250 in.
- Material:
- Forged 4340 steel
- Engine Balance:
- Internal
- Lightened:
- No
- Requires Narrow Bearings:
- Yes
- Rod Journal Diameter (in.):
- 2.200 in.
- Main Journal Diameter (in.):
- 2.750 in.
- Rod Length:
- 7.100 in.
- Crankshaft Snout Style:
- Standard
- Balancer Bolt Thread Size:
- 3/4-16 in.
- Weight:
- 67 lbs.
- Quantity:
- Sold individually.
- Make:
- Mopar
- Engine Family:
- Mopar big block RB
- Engine Sizes:
- 6.8L/413-7.2L/440
- Years:
- 1961-1979
- Flywheel/Flexplate Attachment:
- 8-bolt
