I did a before and after dyno with the MSDS, and if by stock dyno, not sure if you are referring to a stock tour just with headers and no other mods. Well my car at the time had cat by-pass/twin exit exhaust/induction kit (KKM - I know it might implode! Working on a K&N right now...)
and I saw 10hp and 5 lbs/ft. TBH, I am very impressed with them, its not just the additional power (or the sound which is getting VERY loud but its still sezy) but its how it induces revs, its almost like fitting a new lighter flywheel. I think its because of exhaust scavenging?
Anyways, I think they're great.
