Recent content by Aharp

Yes, different displacement. However in my research the only differences I can find besides the displacement is the cams and throttle bodies. The valve sizes are the same between the S and R heads, bore size is the same which would lead me to believe the piston to valve side clearances are...

Hi all, Thanks for letting me in the house 😎 Title says it all. I have a 19 V4S that I have wondered about putting the R top end on. Tuning adjustability would obviously need to be top level which is maybe why I have not found anyone who has done this. I have a dyno with extensive tuning and...