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View Full Version : 450R Exhaust on 400ex



moore020
02-19-2010, 09:40 PM
Anybody know if a 450r exhaust will fit on a 400ex? If so, would there be any benefit.

honda400ex2003
02-19-2010, 10:15 PM
it has been done, it flows a bit better than the stocker since it made differently. it is not a good as an aftermarket but better than the stock one. It may be a bit better with the hrc kit in it also. It is not chambered like the 400 so it would be a bit more like an aftermarket one with the kit in it. it should bolt on relatively easy with the only being made is a upper bracket that goes to the sub frame since it will mount a bit differently. steve

honda400ex2003
02-19-2010, 10:17 PM
dont forget to rejet if neccessary. steve

moore020
02-20-2010, 06:54 AM
Thanks Steve

honda400ex2003
02-20-2010, 09:03 AM
no prob. steve