Accufab's billet twin blade throttle body is made from the finest billet aluminum and polished to a gorgeous mirror finish. Accufab has designed this product specifically for your vehicle and is guaranteed to increase horsepower and torque for your application. Your stock throttle body flows 1089 CFM and this Accufab one flows 1284 resulting in increased power. When dyno tested on a stock vehicle this throttle body has shown power gains in the 10HP range and with modified vehicles the gain is even more. You will also see increased thottle response and better pickup. Their superior design eliminates any throttle body binding which is sometimes found on other aftermarket throttle bodies. Note: Do not adjust the screws on the throttle body. They come pre-set from accufab. You should only adjust the idle speed thru the throttle position sensor. Applications: 1999-2001 Ford Mustang Cobra 2003-2004 Ford Mustang Mach 1