afr heads and 918 springs
#2
Double springs equal more reliability (peace of mind), less breakage (we dont know of ANY of our standard 8017's or newer 8019's failing in the field), and more RPM potential from the higher seat and over the nose pressure.
WHY would you want to run 918's all those things considered?
Stick with the recipe....weve done all the R&D for you.
Tony M.
WHY would you want to run 918's all those things considered?
Stick with the recipe....weve done all the R&D for you.
Tony M.