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FSWERKS 4-1 Race Header is designed for track use and plays a very important role in maximizing exhaust flow for all out performance for your Zetec Focus. Construction consists of 16-gauge heavy-duty steel tubing and laser cut flanges measuring a full 3/8" thick. FSWerks uses 1 5/8" diameter mandrel bent runners which merge into our 2 1/2" ID collector for maximum flow. Since the Race Header is for track use, it does eliminate the factory emissions equipment, but we do provide fittings for the EGR valve as well as the oxygen sensors. The FSWERKS Race Header will give lightly modified cars a 6-7 horsepower gain and an increase of 4-5 lbs. of torque* measured AT THE WHEELS. Highly modified cars, such as our FSWERKS project Focus have yielded gains as much as a 25 horsepower** gain and an increase of 13 lbs. of torque**, measured AT THE WHEELS. Finished in a polished ceramic coating that can withstand constant temperatures of 1200Â° Fahrenheit.
Dean Shaw on 11/18/2017 7:57:33 PM
Comments: The installation was a bit of a pain and quite an involved process, but the difference in acceleration and sound was well worth it. With the CFM 2.5 flex pipe and the stock cat back it does sound rather tinny, but I plan on getting a full catback soon.