bjwortley Member 80 Member For: 11y 11m 7d Posted 27/05/13 02:31 AM Share Posted 27/05/13 02:31 AM Im also interested in thisAdvantage of 4inch over 3.5inch?My f6 currently stock, would like to aim for 350 rwkw which would be better?Was thinking exhaust re-tune? Injectors/fuel pump if necessary (are f6 stock injectors big enough for 350 or need higher?)Thanks Link to comment https://www.fordxr6turbo.com/forum/topic/55751-xforce-exhaust-thread/page/86/#findComment-1392992 Share on other sites More sharing options...
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