Quote:
Originally Posted by Ginola
It WILL need mapping if your removing the up-pipe cat and fitting a non catted one.
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Debateable this one
I agree that the safest thing would be to map it immediately. But I ran with the standard PPP map on the decat uppipe for 5 or 6 years with no problems at all (and the car gets plenty of stick as you know!). It went on the rollers a few times up at Surrey during that time and everything was fine. The uppipe cat doesn't do much really....
Of course, downpipe is a completely different matter, mapping definitely needed. As Mike is doing the downpipe too, then he'll need to map it for sure.
Quote:
Originally Posted by C. J.
IMHO a STi un catted uppipe will do the job
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Yep, thats what I replaced mine with
