Tune w/ HFC's
#16
Tune will increase the performance and make your car run great!! Maybe sometime soon Motordyne will come out with a pleneum spacer or Mrev 3 or something for you guys to make your motor's awesome as well. If you don't plan on doing anything else then I would just go get a tune then. It will be worth it in performance gains in the engine plus the engine will be running at its prime at all times.
#21
#23
#24
Those dynos on g37 showed a measurable difference with just cats so why shouldn't I expect to notice it? If anything, I'd think I shouldn't expect to notice the difference from just cats to cats w/ a cat-back. That's gonna net all of 4-5 more whp? 5hp isn't "noticeable" until you're looking at .1's or .01's in the quarter or on the track.
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