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On cars fitted with a cat this can be replaced by a bypass/test pipe
This will decrease the weight, run the engine cooler and increase the power as well as the turbo spooling up sooner (the noise increases a little) I decided to have one made in stainless steel by Hayward & Scott. The difference was remarkable and the whole thing including fitting cost £350 I decided to keep the original back box which with PCGB is only £99 from a
main dealer (not so long ago these were £300+)
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