SF600R Challenger

American tuner SpeedFactory already builds a 600 hp Dodge Challenger, the extra power coming courtesy of a Vortech V3 supercharger.

But now it is also offering an alternative route to achieving that kind of output: the SF600R.


The big difference is that its Hemi engine remains normally aspirated, but is bored and stroked to increase capacity from the stock 6.1 litres up to 7 litres. The cylinder heads are also reworked, and feature new valves and springs. Together with other modifications, including a high-volume air intake and Corsa stainless steel exhaust, SpeedFactory claims the engine produces a dyno-proven 595-605 hp. Transmission choices are a five-speed automatic or six-speed manual.

To help control that increased power the suspension and anti-roll bars have been upgraded, and the SF600R runs on 20” BBS Black Edition CH-R wheels with Michelin Pilot Sport PS2 tyres.

Also part of the specification is the SpeedFactory Signature package, which features a serial numbered plaque and exterior badging and graphics. On the inside, the leather seats and door panels are embossed with SpeedFactory branding, and custom floor mats are fitted.

Available now, the SF600R Challenger is priced at $73,900 in the U.S. (roughly £49,800 / €58,100). That’s almost 70% more than a standard $43,655 Challenger SRT8 with its 425 hp.

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