re downpipe question

[steff109]

can anyone tell me about the downpipe i know it is a fast flow cat but is alike a haywood and scott one more beneficial or am i best just sticking with the standard one also i had a bellmouthed one on my old scooby which sounded fantastic and wanted to do the same its already been mapped and doing 343 with just a k+n and cat back

[marky mark]

I would think there is only a small difference between the prodrive cat and an aftermarket hi flow cat, if at all, but i don't have data to back this up.

If by bellmouthed you mean open necked as opposed to the twin dump pipe then it will sound hardly any difference. The sound difference would have come from a different cat or a decat system.

The WR1 does not have a traditional twin dump pipe anyway, it has an open neck design with a small splitter in.