My s2's are lopey, and vibrate a little at idle on 2.0 stock block. if you want smooth idle, get s1's.

 

Agreed, they don't affect the way it drives really but they do sound very lopey. Not sure I agree about the vibrations tho. The revs sort of come in surges so I suppse it's more noticeable than a constant rumble, but it's not an issue IMO

 

on a evo 9, thanks to mivec, s2 are perfectly civilised... apart from a bit of lope at idle..

 

Get Tomei Pro

Americans love GSC S2 and Kelford but Tomei Pro 270 are so much better. (had a 6 with this and it sounded like a prius)

Only the R2 I would get of the Tomei Pro 270. I have tested them all.....R2 are overkill though

 

Well i bought gsc s2 cams! also bought gsc springs and ti retainer! getting them installed soon! this helped