I added the throttle body spacer too. It's pretty annoying to hear the hiss/whistle... But it's tolerable. My wife thought something was broken.
So far I've added the Volant CAI, the TBS and the Mangaflow dual exhaust. The butt dyno says that it's got a much more responsive throttle and a little more power at speed for passing. Gas mileage hasn't increased at all... But then I regularly cruise at 80+MPH. My high was 17.6 on a day I took it easy. I would imagine that 55-60MPH would net 18+MPG... But then people would be honking and flipping the finger when passing.
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2006 H3 - Luxury - Superior Blue - Sunroof - Chrome Pkg. - Chrome Step Tubes - AVN30D with rear view camera and iPod connection - Volant CAI - MagnaFlow dual exhaust - Throttle Body Spacer - Train Air Horn (to be installed) - More adds to come (New shoes & supercharger!)
1990 Porsche C2 (911) - Highly modified and very, very fast!
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