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      12-06-2012, 11:08 AM   #18
GTM_Challenge
 
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Drives: E92 M3,X5M,F30 335
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Quote:
Originally Posted by RollingHard28 View Post
How much HP does each downpipe add? Also can you explain the difference between the two?

How much louder would this make your car once you add it? Is it going to be super noticeable to authorities, or would it still be low key?
Our dynos have been on tests with out full exhaust only at the moment. The HFC model has a 200 cell high flow cat on it which will still filter some emissions where the other has the cat completely removed for the highest flow possible. There should only be about a 5 HP difference between them with basic mods
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