I got a spare Rustler 2.5 header lying around, I got one with my conversion kit but I didnt know it was included so I'd already bought one off Ebay, Also I've actually seen a rear shock tower that allowed a dual exhaust to exit through it made for the Nitro Rustler and the Nitro Sport uses the same rear shock tower, you would still need the 2.5 header but it looks sweet, I already had an aluminum rear shock tower when I found these, PM if you want me to want the link I'll see I think I have it bookmarked somewhere.