Dont have the stock header but i do have a full dr d system from my 07 and 09 yz450. Dont want much for it. Really worked well on those years.
Scott 440 724 9359
I gave him one so it is taken care of now.......but the '07 and 08/09 are two totally different diameters. They can not be interchanged. The '07 is much bigger. 08 header pipe will fit inside a 07 header.