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i have a 97 uk turbo,had a super chip fitted 8months ago and was pleased with the results,so then had a cobra back box fitted,nice sound but im sure my car is now slower pre boost ,any thoughts on this ?

JCScooby

Ive got the exact same car, with HKS back box and just fitted magnex de-cat (no chip though) since fitting it i find it hard to say if its running better. If your anything like me, u may feel that the car pulls better at high revs. i agree with your pre boost comment.