This camshaft is for the Race Head only (Not for stock head) – Similar to TBW0189 but more aggressive lift and duration without sacrificing low end torque. Uses NTN bearings. Specs: .275″ intake valve lift and 230 degrees of duration @ .050″, 275″ exhaust valve lift and 230 degrees of duration @ .050″. Size: 42mm large bearing, 28mm small bearing, Approx 70mm center to center.