unfortunately st170's arent all there cracked up to be. dont get me wrong they are very nice cars but they are heavier than a standard model although they do have urated brakes and suspension including anti roll bars.

i have a mk1 2l zetec with pannel filter, uprated air feed to box, 4-2-1 and milltec cat back. on the drag strip running escort size 195/50/15's i was beating st170's with cat back systems and bluefin!!! not bad considering i was a good 30 bhp down!!

mind you running those small wheels is crap for every day use and you cant fit the st170 brakes undernieth them...which is a good mod btw 8)