FMF Power Bomb Header Pipe Exhaust HONDA CRF450R 2004-2008 CRF450X 2005-2017. HONDA CRF450X 2005-2009. The external chamber also acts as a type of "pre-muffler" that lowers the exhaust note up to 1.5 decibels for a deeper, throatier sound.
had to modify the bracket with a metal blade on angle grinder
The pipe fit and works now that I modified the mounting bracket. The bracket was put on backwards so the flange was in-between the head which stopped the bolts and the pipe from completely snugging against the head.