S&B 8ply Power Stack Air Filter - Black Rubber Cap, 4.50" Inlet, 9.00" Length, Blue Element Item ID: SBPSR-450-900-BLU Size (spec): 4.50" Material (spec): 8-Ply Cotton-gauze Dimensions (spec): 4.50" Outlet ID x 5.25" Cone OD x 9" Filter Height (spec): 9.00"