OEM Cummins ISB/QSB 6.7L Crankshaft Adapter
Cummins Part No: 3957841
Genuine Cummins crankshaft adapter, part number 3957841, pulled from a running EPA13 6.7L ISB/QSB engine. This is a good used takeoff — no cracks, no damaged threads, ready to install. Correct fitment for 2013-and-later emissions-tier 6.7L B-series Cummins engines only; if you're not sure your engine is EPA13, check your engine's data plate before ordering.
SHIPS FAST:
Small, light part — ships same or next business day via UPS/FedEx
Ground in a padded box.
Local pickup available in the Sacramento, CA area.
