The standard shape pipes (ie left and right side exit) are based on JHA's design so the performance gain should be the same. Not sure about the GP style pipes as seen on eBay but I've bid for them all the same.....
I registered when the site reopened (I was about number 4 or 5!) but since then my log-in has not worked!! I won the auction for the Nikon pipes, anyway.
Sorry Jeff. Drop Charles a line and ask him to check out your account. I'll e-mail him too, but obviously he won't have your password so you need to contact him really.
I wanted to e-mail or PM you. Let me know how you get on.
Frank, the guy that makes performance 2-stroke pipes, is shutting up shop. He has some sets of Nikon pipes left and you should be able to argue the toss with him to get them for £250-£300 a set. They are all hand made and follow the JHA pattern for the side-by-sides and the same pattern as the Tyga pipes for GP style. Use for MC21 or MC28 (MC21 dyno shows 5hp increase; need to run 135 mains) Go to www.nikonpipes.co.uk to see for yourself
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