Just wondering if I should be looking into getting bigger valves for my NA B16A build. Here's what I've got so far... Buddyclub Spec 3+ cams Double Valve Springs Ti Retainers Adj Cam Gears Skunk2 Intake Manifold w 70mm throttle body (possibly upgrading to ITB's at some stage in the future if the wallet allows...) Will also be getting some aftermarket extractors on there at some stage too, into a 2.5" exhaust. The head is at the shop at the moment getting a port and polish, and while its there I want to get some stainless valves. Herein lies the question...Should I be going oversize, or stay with the stock sizing? I know the PR3 head flows reasonably well with the stock size, but I guess its really a matter of weighing up extra volume (oversize valves) against slightly higher air velocity (stock) which will then allow for better air/fuel mixing. Thoughts/advice anyone??