i have 3l with t04e turbo 3 in pipe to the back of the cat(what looks like a cat just strait pipe with a cat rap) was runnin standed system from ther back and it was fine but restricted so i put 3 in right through with just a hot dog but car now over boosts and is running **** what would be a good set up from cat back to solve this problem i have
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hey mate i have the same problem.
and only starting doing this after today i installed 3 inch cat back because my dump pipe was 3 inch and my cat back was only standard .
have you found out what was wrong ??
