Pacific Crest does a great job. I am still using my stock Messico pipe on my 99 EC200. I have sent in my pipe at least 3 times to them for minor to major repairs, every time it come back perfect. The mounting tabs are numbered when the pipe is returned, and it mounts right up, so they must be using something to true the pipe. $60.00 is alot better than buying a new pipe. Sure I could have replaced the Messico for the money I've spent on pipe repairs, but a the Messico is a conversation starter
They list GASGAS on the ording page.......Give them a try...