I've got the V6 airbox JMS kit, although their rolling road test states a 10bhp gain,
no-one on here has seen any real increase in power including me.
An extra 10bhp would be noticeable, when I remapped mine with a RSTuner box it only gave me 6-8bhp
and I noticed it straight away, an extra 10bhp from a V6box would be noticeable instantly.
I don't feel like I lost any power it just makes a much better noise, but seeing as it's on the car I might aswell
keep it.
As for matched inlets, alot of people say it's one of the best breathing mods, but they diddn't do a damn thing for me
I should have spent £170 on booze and hookers!
But each car is different.