Will370z Posted June 3, 2012 Share Posted June 3, 2012 I went for hfcs purely for the noise, great combo with the milltek and the car sounded glorious. One of the best additions i ever did. Another HFC fan here too - my car sounds fantastic and I had plenty of compliments on the exhaust note at Oulton Sorry to crash this thread but I've a quick Q re the UpRev - do you actually see any MPG gains? I've read conflicting reports and whilst a better MPG isn't something I'm overly concerned with any improvement will help to justify the cost of the UpRev to my other-half teehee. Thanks, S. Mark at abbey said you could get mpg improvements, and i guess they could tweek the ecu to gain more. Imo though id still go for the optimal torque tweeks, no point buying a zed and then trying to make it fuel efficient Quote Link to comment Share on other sites More sharing options...
Adam rs Posted June 4, 2012 Share Posted June 4, 2012 I gained a consistent 2 mpg increase. 1000 miles pre modifications 23.9 1000 miles after 25.8 Been 12 months now and still the same. Quote Link to comment Share on other sites More sharing options...
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