Can anyone advise me on which type of Kent Cam to get, there's the Sports Cam (adds 16 BHP) or the Sports Cam R (adds 18 BHP), both cost 250 - The difference between them is the sports Cam kicks in from 2000-4500rpm and the Sports Cam R is supposed to kick in from 2500-5000rpm but this is supposed to make your car idle like a bitch!

Anyone had either of these cams installed? Do they really make a noticable difference? Will they amplify the sound coming from my Stainless steel Janspeed?