MOTORDYNE ART Pipes - Review

Armonster

Well, I am not sure my situation applies to most. I am using these pipes with the nismo exhaust and have heard sounds that nobody else seems to be hearing. With that disclaimer, I would say:

1st week: Very slight metallic-sounding rattle inside ART pipes during cold start and deceleration. Rasp during acceleration above 3000, in the form of a hissing sound - NOT the typical hiss on deceleration (in fact, there was never any of that). Instead, it was the sound of air rushing through the pipes and it was coming straight from underneath me.

2nd, 3rd, and 4th weeks: Rattle sound gone completely. Rasp/hiss on acceleration remains. Because the Nismo exhaust is relatively quiet and deep, and the hissing was quite loud, it was bothersome. I was contemplating putting the stock cats back on or getting a different catback. The hiss was coming straight from the ART pipes themselves, or maybe the y-pipe - but that general area.

5th and 6th weeks: Hiss/rasp slowly went away. The type of rasp changed from a hissing sound emanating from the pipes themselves to a much more subdued, open-exhaust type rasp that you would expect. Except now, the rasp (which, again, is very slight) comes from the exhaust tips rather than the ART pipes under the floor board. This is about what I expected from reading about the ART pipes, and I'm happy with it. I don't think HFC's would be any quieter.