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 struts, and new sway bars. 20-inch BBS wheels are wrapped in Michelin Pilot Sport PS2 tires.
Leather seats, leather door inserts, custom floormats and various badging round out the package. The 2010 SF600R Challenger is now available, and costs $73,900.
SpeedFactory Introduces the 2010 SF600R Challenger
Atlanta, April 20, 2010 – SpeedFactory, the leader in modern Mopar supercars, today announced the industry’s first 6spd manual, 600 HP ‘SF600R’ Challenger, as part of their complete line of 2010 Mopar supercars.
The ‘R’ designation in the SF600R Challenger denotes a SpeedFactory hi-performance, normally-aspirated, bored, stroked and balanced 6.1L Hemi block, increasing the displacement to 426 cu. in. (7 liters).
This modern 426 powerplant has an all-forged rotating assembly and features CNC ported aluminum heads with new valves, guides, seals, Bee Hive springs and titanium retainers. A custom Comp hydraulic cam along with an 85mm throttle body works 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.
Additional SpeedFactory performance modifications include a CARB- certified high volume air intake and Corsa stainless steel cat back exhaust system for better breathing. The increased power is managed with a Centerforce clutch and a Getrag IRS with 1000 HP half-shafts. Handling is improved with performance springs and sway bars as well as additional front and rear strut tower braces. The SF600R Challenger rides on premium Michelin Pilot Sport PS2 tires mounted on staggered 20? BBS Black Edition CH-R flow-formed wheels.
The SpeedFactory Signature package is also included on the SF600R and features a serial numbered plaque along with SpeedFactory exterior badging and graphics. Inside the SF600R features premium leather seats and door panels embossed with SpeedFactory branding as well as custom floor mats.
On the addition of the SF600R Challenger to the SpeedFactory line-up, Mike Brillanti, President, SpeedFactory Sports Cars stated “This car offers supercharged power in a normally-aspirated, 6spd manual package. It’s a true enthusiast’s sports ar and it enables us to widen the appeal of SpeedFactory products to now include a 600HP vehicle for those enthusiasts who prefer a ‘normally-aspirated’ powerplant. We offer the SF600R with either a 5spd automatic or the 6spd manual transmission. ”