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My Z is just a weekend toy and made 370whp about 4 months ago.
I would like to make 440-450whp NA and 550-600 on spray. I imagine to obtain the goal more easily I will need to switch over to longtubes. I have no issue as long as the car could remain emissions compliant.
Would I be better off just doing some ported LS6 heads? Any cam suggestions or what to start reading up on to help obtain my goal?
I've had LT headers on mine for 15yrs in Texas and never had a problem passing, as long as he has cats it shouldn't be a problem or know a friendly inspection shop. You have some nice shops up there in D/FTW area, just post in the SW section. Good luck, L8R ZFLASH