Hey everyone, quick question - Has anyone been able to retrofit a newer exhaust muffler style on an older model CRF450R? Here's my thought process: Take a new style Yoshimura RS-4 muffler and get an exhaust shop to weld it on the factory pipe. Only issue - The RS-4 exhaust is available on the 2009+ CRF450R compared to my 2006 model. My year only has the RS-2 designed for it. Anyone think this is possible? Thanks!