Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum - View Single Post - Basic Bolt ons: Exhaust Headers/Flex Pipes
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Old 01-01-2011, 10:54 AM   #67
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Originally Posted by russmistro View Post
isn't a header w/ stock exhaust pretty pointless? the exhaust is so restrictive the header is going to be JUST for noise until the exhaust is opened up for the motor to breathe more?
The most restrictive part of any exhaust is the cat. Remove it/them and the rest is comparatively fine tuning. You may also look at it the other way. Mounting a header with a trailing cat, gain would be effectively zero, as any potential gains from the header would be negated by the cat. Hence, the only reason for folks that need to meet emissions may want to purchase a header would be economic, as the stock mani-cat retails for ~1400.00.

In Focus >> Is this primarily street car? You seem to be working towards a track car.
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