Smoothest thing about this install was removing the header from the box. At first glance, product seems to be good quality. However, to say this header doesn’t fit is an understatement. Had to shave the motor mount bracket down at the top and bottom just to clear the front runner and secondary air system chamber. On top of that after leak checking it since it was leaking horribly from the aft port I noticed the bottom flang is too large and contacts a portion of the rear housing. That doesn’t sit flush with the rest of it. The only way this will fit is with serious modification, modification that should not be required for a “bolt on” product. Save yourself some money and time and spend the extra on a RB header.