shorties are a waste, if you got the $$ for long tubes, then do it. many people have posted big gains, but it also comes with a heavy price tag. expect to pay around $1000 for the pipes and new h pipe, then installation is around 8 hours from what i have heard. at $80/hour for a shop to do it, i dont think so. if you can do it yourself, or have deep pockets, thats when it is time for the upgrade.