test pipes vs. HFC
#18
Originally Posted by audio_file
thx!!
https://g35driver.com/forums/intake-exhaust/122425-fast-intentions-300-cell-metallic-high-flow-cats-pictures.html
400 cell ceramic
https://g35driver.com/forums/reviews/121086-review-fast-intentions-hfc-400-cell-ceramic.html
#19
#21
#22
I believe the person who started this thread is referring to my videos on Youtube. I have videos posted of my HKS with the high-flow cats and test pipes. The videos may not sound much different because the engine isn't under load...but if I had any drive by videos, you would hear a considerable difference.
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