I had a DynoPort pipe on my 89 LT250 top end pipe with dynoport porting in the 90's and had no trouble outrunning big bore Hondas on the ice and flattracking. Just getting back into the 2 stroke suzukis again after going with the 4 strokes and already called Dynoport to see if he still does quadracers. I see there is new builders out there but I wouldnt be afraid to use there pipe again.