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Originally Posted by Less
Fitting one of those decreases their performance because it de-tunes the exhaust to the engine, I think entwisi did a good explanation about this in another thread. If I can find it I'll put a link in here.
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No need. I know how they work thanks. Thats why i said that they
think that they'll improve the performance. I know that they actually do the opposite unless used inconjunction with a highly tuned engine.
