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Honda400exrox
01-26-2005, 01:41 PM
How loud is the curtis sparks pipe with a jet kit and air filter on a 400EX? How many decibles? because ive heard that they are really loud

Hotdog
01-26-2005, 01:46 PM
i got 105 decibals at the local track.

Honda400exrox
01-26-2005, 03:31 PM
is there a diff in sound and power between the x-4 and x-6 also are those pipes good for 400EX's with no engine mods?

Fast350ex
01-28-2005, 08:56 PM
The x-4 is good for a mostly stock engine, the x-6 is for heavily modified engines.

Honda400exrox
01-28-2005, 09:45 PM
If you put an X-6 on a non heavily modified engine will it hurt the stock engine?

Fast350ex
01-30-2005, 10:53 AM
I'm not shure, you might want to check with Sparks on that one.