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Discussion Starter #1
Fitted a Japspeed all-in-one downpipe & Apexi hi-flow cat just over a week ago (did an ECU reset) and after driving 300 miles + have noticed the following:

1) Turbo spools up much quicker and seems more vocal
2) MPG about the same
3) Even though turbo spools up much quicker, no noticeable performance gain

Does this sound about right, as I thought the tubby spooling up quicker would have meant a bit more of a kick in the pants?


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