Would it not in the long run be more beneficial to just put in an 03-04 motor instead of dealing with the laundry list of crap required to get a 99-01 motor adapted for the twin screw? On top of that the lower end of the motor and all... is it considered practical to spend 3-4k for a roots blower, or spend that money on a motor? :shrug: Just not seeing why everyone does it i guess.... Being the motor maxes out at what.. 450hp? You can easily achieve this with a simple pulley and tune on a 03-04 :/