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b400ex
02-13-2005, 07:19 AM
what is the quietest pipe for my 400ex that would still give an increase in power? Thanks!

85atc350x
02-13-2005, 07:53 AM
I'm not really sure that you're going to find a slip-on that will give you a noticeable power difference and be quiet at the same time.

JOEX
02-13-2005, 11:35 PM
Look into the LTE Dual exhaust system if you have some $'s to spend. They do cost alot but when you consider what the whole package is, it might be worth it.