Has anyone seen or heard of someone installling the 450r pipe on a 400ex? My brother got a new pipe for his 450r, and we haven't tried fitting it yet, but just curious if anyone else has already tried? It's got to flow a lot better than the stock EX pipe since it's made for a 40+hp engine... has anyone taken apart the 450r pipe to compare it to how the 400ex pipe is built?

 

i dont know but i would think the bends would be a lot different

 

Looking at pics online they don't look that dissimilar. Are there any aftermarket pipes that claim to fit both machines with the same part# pipe?