F2 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 Duratec Focus. Construction consists of 16-gauge heavy-duty steel tubing and laser-cut flanges measuring a full 3/8" thick. We use 1 7/8" diameter large mandrel-bent runners which merge into our 2 1/2" ID collector for maximum flow. This Race Header will give lightly modified cars an 8-10 horsepower gain and an increase of 6-8 lbs. of torque measured AT THE WHEELS. Highly modified cars can see even better results. The header has been painted with high temp Ceramic black paint. Flex pipe is not included
Fitment:
Ford Focus Duratec 2.0L 2005 2006 2007
Ford Focus Duratec 2.0L 2008 2009 2010 2011
Ford Focus Duratec 2.0L 2012-18
Ford Focus Duratec 2.3L 2003 2004
Ford Focus ST Duratec 2.3L 2005 2006 2007