Dinan High Flow Throttle Body - 1999-2003 BMW 540i/1999-01 740i/2000-2003 X5 Inline Chips & Modules Dinan's Wheel Spacers physically move

Dinan's Wheel Spacers physically move the wheel further away from the hub

While sound is of the utmost importance for any exhaust system the fit and finish are nearly equally as vital

the 'X' removes unwanted nuances in sound caused by uneven exhaust flow that is found in stock systems

Dinan engineers designed the BMW 750i exhaust to improve exhaust flow by reducing back pressure

Dinan High Flow Throttle Body - 1999-2003 BMW 540i/1999-01 740i/2000-2003 X5 Inline Chips & Modules Dinan's Wheel Spacers physically moveDinan's High Flow Throttle Bodies improve intake airflow for additional horsepower and torque gains. The internal diameter of the stock throttle body is bored larger increasing the airflow area. The resulting increase in airflow provides more horsepower and torque throughout the RPM range with noticeably quicker throttle response. The throttle body is 3mm larger for an 8% increase in airflow area (Stock bore 79. 5mm; Dinan bore 82. 5mm).