I would be conserned about cooling also using a Pauter Motor on the street.The Pauter Pro heads are great and the motors are awesome,but not designed for street use.I know Remmele well,and he is hard to get a hold of by phone and email sometimes.If you are interested in a 3 liter or larger from Remmele send me a pm with your name,phone number,email and address and IŽll try to get a hold of him for you.