BC Brian Crower Crankshaft for EJ20 Subaru WRX (BC5605/BC5609)

Brian Crower crankshafts are made from 4340 billet steel. Each crankshaft undergoes stress relief, shot peening, magnaflux inspection, and nitriding (a multi-step heat treatment) to ensure peak performance. Fully profiled counterweights are designed to minimize windage through the crankcase, reducing oil resistance and enhancing RPM potential.

Vehicle Fitment:
2002-2014 Subaru WRX
(EJ205/EJ207 engine)

Purchase Includes:
(1) 4340 Billet Crankshaft

Notes:
Images are for reference

More Info:
BC crankshafts are crafted from top-grade aerospace 4340 steel billet. Precision CNC machined on advanced 5-axis Mazak Integrex 300-IV machines to exacting tolerances of .0001", these crankshafts feature large radius journals for enhanced rigidity under high horsepower, boost, and rpm conditions. The crankshafts are gun drilled, and CNC ground with smooth oil holes for optimal lubrication, incorporating tear-dropped scoops and cross-drilling for priority main feeding. Each crankshaft is micro-polished for superior bearing lubricity, stress relieved, shot peened, magnaflux inspected, and nitrided through a multi-step heat treatment process for maximum performance. Fully profiled counterweights reduce windage in the crankcase, minimizing oil resistance for improved rpm potential.

See more BC Products