i have a friend that runs that STS .30 and i run the STS.28. i havent run mine yet but the friend has said that his absolutely hauls ass even without a decent tune.. granted they are not the easiest to tune with 3 needles?? mine has 2 needles... but once i get my .28 broken in with the stock pipe im putting on the savage outlaw race pipe on her.. i put it on there for show right now oh the price was good too.. i bought my .28 on ebay for $134.00 shipped to BC from hong kong.. they are $114.00 i think without taxes and shipping.