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Down Pipe Done! Up Pipe?

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Got a new downpipe from meercat and i was wondering if it makes any difference getting the uppipe done before my car gets mapped on the 30th, is it going to make it more bhp than just having the downpipe done.


If it's a WRX (newage - I'm not sure about classics) you have, the up-pipe has a cat in it so decatting it will make a difference once it's mapped.

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Huge difference - you can run higher EGT ( exhaust gas temps) which means you can whack up the boost.

If you leave the cat in the up-pipe you'll not spool up as quickly and there's a chance the cat could break up with bits of debris being eaten by your turbo.

You'll maybe get an extra 10 bhp if your lucky


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