Well legality is a big thing too... I know here in cali its ilegal to drop a ZC But if you got frends you can still get it smoged. Si trany would probably be the way to go. They have 92+ DOHC ZC's in fact they made them all the way till 98 so there are plenty of new ones ready to be shiped from japan (Mines a 94) There is also a large aftermarket suport for these engines in japan (I have an importer that lives there) Unfortunatly these parts are TAXED by the time they get here Lookin at about $750 for a NICE set of headers. Probably not legal iether.