I spoke to Whipple yesterday and they said there 2.9 supercharger kit for the 5.7 and 6.1 should be available in about 60 days and that it will add about 175 HP @ 10 pounds of boost to a stock motor.Will retail about $7,000 includes everything needed for installation.They have also posted this on there Facebook page if you want to check it out.Cant wait for mine.:fight: