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Message: <blockquote data-quote="LI98GT" data-source="post: 716638" data-attributes="member: 8068">Appreciate the input so far - I want this to be a healthy discussion. So that is what I ran the last time out with DRs with mod list (again minus LCAs). Sorry, guess I used the wrong words as you are correct, the NPI pistons are not flat, but do have less of a dish than the PI pistons. From where I was at last time out, I'm trying to drop ~.5. Willis, I discounted the stage II cams due to cost an emissions issues <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite3" alt=":(" title="Frown    :(" loading="lazy" data-shortname=":(" />.Maybe it's too much for me hope for, which is why I was asking if anyone did just the heads on top of PI cams and PI intake with the increased flow and compression that they bring. Hoping that not just the extra 10-20 rwhp peak but additional improvements under the curve (if they exist?) might get me down to low 13s. I do have some mods to go along with this setup i.e. gears, upper intake, 70mm TB, pulleys, catted X and catback, DRs plus the aformentioned LCAs. Unfortunately, being on L.I., doesn't afford me the luxury of going to a track that often to improve on driver mod that much as there are none on L.I. and the closest track is several hours away. Maybe the heads plus a tune? I'm still on stock tune.</blockquote>