i have a 1992 ex sedan. it has sohc vtec. ex sedans are by far the heaviest of all the civics. i've raced a crx (not sure if it was si or not) and beat it but it wasn't from the line (it was through traffic) so i'm not sure how reliable that is. i can still lose even racing an ex coupe because of the weight difference. i doubt i would ever bet $100 against a hb si in my car as it is now. but i only have a cai (no headers or exhaust) so i don't know just how much of a difference that stuff makes. that's my $0.02.