stock turbo exhaust
would it add HP to an N/A
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probably not. on the s5's I think they are the same from cat back.
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how bout s4
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no change other than it would be slightly louder.
The y pipe is the same, only the mufflers change |
will it sound cool?
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if you remove the catalitics it would sound loud!. but cute..!
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would i gain HP if i remove the cat
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removing just about any restrictions in the exhaust would gain you HP, to an extent...
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would i have to mess with the air pump?
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