the spt's compared to stock is like night and day. The ride is much more quiter/comfortable
and from what I can tell, the traction is a hell of a lot better than the worn out rsa's.
I could easily break the rsa's loose, but these spts take some work, even in last nights rain
I think ive heard to 452's have better traction, but im happy with my spt choice, cheap and good
install was 60

at the mazda dealership. I cant believe I actualy took my car to the stealershipo, but i was quoted 112 at discount, 75 at ntb, etc , they were the cheapest