I say this as I have all those, I also have had more than one engine, and with our heads flowing so much unless your totally nutted out with like a. and BTW I believe in break in oil and oil change after break in.using driven racing br30. What you should spend your money on c5r timing chain, three bolt gear for chain, ls2/7 style dog bone dampener and the most important a high volume pump. IMO if your going stage three why not four?.Heads will not make much, the deal is for L99 owners for upgrading the valve, sure there is a tiny bit of work in the combustion chamber and the runners flow 10% more because of the heavy machining.
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