well cometic have a built in o-ring
so no o-ringing of the block is need (same as hks)
whereas the mitsus do for ultimate sealing..
i'd got cometic, std bore, HP model
i sold one to TONYDAV aaaaaaages ago, not sure if he is using it
pm him man, he'll probably still have it!
stock bore,
offer him $150-170.00
u can get a non HP one for about that much also..
but i'd go HP if i were you (lower comp., higher boost)
i've got a HKS in mine, not worth the money $400 - 500 bux for a head gasket
i hope i dont have to replace it anytime soon..
quality wise, cometic looks the same..
make sure to get some arps while your at it