Cheapest/Best(?) to get 500 RWHP?

ssqpolo

im gonna kinda disagree with that. i say 500whp is fine on stock block. I doubt you will be pushing it hard all the time, so an occasional spirited drive/drag race will be fine. most efficient way to that power goal is twin turbo (i.e. gtm).. that would also require exhaust, fuel, and clutch/flywheel, and cooling. i would say it will be north of 10k. make sure u have a good tuner. best of luck