Dodge is sending three Challengers to SEMA this year. One of the three is the Challenger SRT10 concept which has a swapped Viper V10 engine. The Viper V10 produces around 600 hp and 560 lb-ft of torque. The brakes and suspension get an upgrade as well. Of course there is no telling if Dodge planning on actually offering this combo to the public. My guess is Dodge will stay far away since even GM is finding it hard to sell cars with their LSx platform.