Hello from cheyenne wy. every one... I wanted to share what probably most already know... but here goes. I have been reading a lot of threads on other sites about YFZ450R owners with just a slip-on and want to run the full system, i'm specifically refering to the GYTR system. when ordering the system you can either get the slip-on or the full, and i could not find just the 09'gytr yfz450r head pipe, the catalog or gytr site show the header for the regular YFZ but not the "R". It's no secret that Dubach works hand in hand with gytr so i went directly to them...( Drd#1215 head pipe YFZ450R & X 09' up) this pipe is a stainless steal and does not have the heat shield but i wasn't concerned, it sticks out a little further than the stock but does not get in the way of my leg, looks great, sounds great. i have not changed my pc5 map for the correction yet and don't know if a guy has to. noticed a stronger low end.. great job Drd.