When I spoke with http://lovefab.net/ the guy on the phone told me that the NSX heads flowed 330CFM from the factory and that unless you did a stroker 3.8 liter NSX and do an aggressive port, there isn't any real need to port the heads.
Honda makes so many engines and have tons of knowledge base as a result.
All they needed was a V8.
Just look at one of the possible NSX replacement with this 550HP 3.5 liter V8 and the latest in Vtec.
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2005 GTO Maggie, Forged engine, CAI, Kooks LTH, Magnaflow, Billet Pro shifter, LS7 clutch, 245/275 18" on Petrol Octane, Addco Sways, Koni Yellows, King Springs, Whiteline bushings, EBC Red, X-drilled/slotted rotors, SS brake lines, 55w HID, PLX gauges
1993 NSX Kenne Bell 2.1, Laminova IC, sway bars, NSX-R chassis bars, and non-compliance toe links, Tien EDFC, STMPO exhaust & brake ducts, RM Racing headers, K&N/Cantrall intake, Enkei RP03 17"18", APR GTC-300
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