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.