I put down 718 rwhp on a Dynojet with the Whipple, headers, cam, cai, and 3.875 pulley. If I could do it over again, I'd probably choose the IPS twin turbo. Great power, torque, and better fuel economy.
2010 IOM Camaro 2SS/RS manual trans
(formerly Whipplecharged, then twin turbo, now just a single On3 Turbo)
Magnacharged 2000 Trans Am WS6 manual trans
2010 Dodge Ram Crew Cab Sport 4x4