When i got all my work done to my Zed up at ESR, i intially had the scorpion exhaust put on as this was the only one on the shelf at the time, but since then have gone to a private exhaust fabricator in essex, Hayward and Scott, a really nice bunch of guys and top class work, the exhaust i have now, has blue tips, and sounds . It prob will cost a bit more, but you can get it exactly how you want it, stlye, sound the lot