X4 with stock 853 heads
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X4 with stock 853 heads
Someone in another post said that the older heads did not like the bigger cams, is that true? My heads are stock unmilled, unported, but will have new springs, seats, seals and retainers. I know they wont flow 300 cfm, but if the heads will not work well with these larger cams, I will need to port or replace. What are your opinions?? Thanks, Joey