- May 6, 2006
I have a 74 MKII, it needs a new head, can I use any other heads besides the RH10 that's on it now??
Ron L said:My experience is the RH10 gives a slightly better mid-range than the RH4. This was testing on my 850 Interstate with 2S (combat) grind cam and a 22-tooth countershaft sprocket. I attribute that to the smaller intake tract which probably fills the cylinder a little better.