With the pi intake without changing the heads maybe cams and full bolt ons what kind of power can really be expected to be made on motor no power adders
I got your valves for Npi heads. The heads flow great with VERY little port cutting. All they need to out do the PI heads is the right valve. If you end up gtaking the heads in for fly cutting the decks ro getting a 4 angle seats cut hit me up the Manley HD valves will go right in at the same time for no extra cost and then they will flow like the Trick Flow hads for cheap.