Do the guru's here think it would be possible to fit an 07 wr250 stock exhaust to a 99 wr400? I've been looking to silence my beast which currently has a White Bros e-series which is deafening. Performance isn't an issue as I'm just chugging along with the kids and the occasional trail ride. Main reason for the odd question is that I noticed a brand new one REALLY cheap. Thanks for any input or suggestions.