2010 SpeedFactory Sports Cars SF600R Dodge Challenger
American tuners SpeedFactory have increased the output of the Dodge Challenger SRT8 from 425 hp to 600 hp (447 kW / 608 PS) without the use of a supercharger. 2010 SpeedFactory Sports Cars SF600R Dodge Challenger Starting with the standard 6.1-liter HEMI engine engineers increased the displacement to a full 7.0-liters (426 cu in). In addition to a higher volume air intake system matched with a stainless steel Corsa exhaust , SpeedFactory also used "a custom Comp hydraulic cam along with an 85mm throttle body with a CNC machined stock manifold that is port matched with a blended plenum to produce a dyno-proven 595-605 HP on premium-grade 91 octane pump fuel," the company states in a press release. Equipped with a six-speed manual transmission, SpeedFactory also adds a Getrag IRS and Centerforce clutch, as well as a few other goodies. The engine is not the only thing to get an upgrade on the car. The vehicle's handling is buffed up with performance-grade springs, added st...