Help: Firestorm Yoshi slipon on 1998 F3
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i had a cut down art slip on i got a custom exhaust place to re-create it and they made it bigger diameter as it was made by hand and i found a lower down tone but no difference to the actual back pressure or anything you may get some popping but never did my engine any harm, 50k miles and it competed at the last race of anglesey 2012