Motoworks pipe for 05 450R

[yfz450admirer]

How is the performance, any dyno's? What is the size of the headpipe? Is the headpipe the size of a Ron Woods pipe?

[MikeHenders]

I have the SR4 full Motoworks exhaust on an 05 R it sounds really nice and gives power throu the entire power range don't know about the size.