Why is everyone talking about the GT-R and the ZR-1 like they're some basic car. These are highly modified and suped up cars and they both are forced induction. Slap a blower or turbo system on to a Viper and watch it desimate anything in its way. Dont get me wrong both the GT-R and ZR1 are highnle impressive but they both were built to compete with cars like the ACR Viper. The Viper is the biggest bang for the buck hands down. That car is still a stock car pretty much. Throw all the mods to it like everyone does to everything else out there and you will have the baddest thing on four wheels. By mods I mean crank, rods, cam, heads, exhaust, forced induction, etc, and there will be nothing that you can legally drive on the road to stand next to you.