Automotive icon Steve Saleen and his new company SMS are proud to introduce the first product in the SMS line of ultra-high performance technical parts, the SMS 296 Supercharger, ... Mopar owners of 2005 to 2009 HEMI 5.7 and HEMI 6.1 vehicles are now able to boost under hood horsepower by up to 45% with innovative new dual-screw supercharger (patent pending).