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Mike M

10-10-04 12:21 PM

Noise with downpipe/cat back

I have a stock engine FD with a PFS catback and want to install a downpipe to reduce heat/back pressure. Will the sound level increase much, as it has with the PFS catback. Also what happens to the air pump if the cat is removed?

MakoRacing

10-10-04 12:25 PM

I dont think youll hear much if any differance with just a downpipe, and the airpump is usless if you have no cat, so you can either leave it sitting there or take it off.

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