i am doing a wrx swap into my 98 rs. i am gonna have the engine for a month or two before it goes in. i was thinking about pulling the heads and port matching everything. i was also considering the tumbler deletes.bolt everything down with some arp hardware. how much hp should i expect and has anyone else had any experience with the tumbler deletes??

Try the conversions forum. This forum is for non turbo cars that are staying non turbo...