http://www.challengerblog.com/2008/h...ady-to-go.html
The 2008 SRT8 Dodge Challenger has not even hit the streets yet and John Hennessey has already come up with an upgrade package dubbed SRT700. The SRT700 upgrade package increases the size of the motor to 426 cubic inches with the addition of a stroker crankshaft, forged aluminum pistons, forged steel connecting rods and high-flow cylinder heads. You are probably wondering where are all the horses coming from and your answer is a 67mm turbocharger system with a air-to-air intercooler that will almost double horsepower output to 725 bhp/750 lb-ft of torque. According to Hennessey who claims the increased power will help propell the Challenger to 60 mph in 3.5 seconds and top out at 190 mph. Pretty nasty numbers if you ask me, can’t wait to see it on the streets.