These high capacity (32mm gears) pumps provide added oil pressure, increased oil volume and oil cooling. Pump only. Includes 8mm Bolts (Will not fit the stock muffler or P/N 3417, 3448, 3450, 3470, 3485, 3602, 3675, 3680, 3760, 3761, 3762, 3766, 55-3470).