My OEM gasket handles 20psi daily, 30psi occasionally (twice now) but is more torquing the head properly than the gasket, followed Tom's guide to torquing it and haven't had a problem. Measure the old one, if it's thicker use a SVT one.
Edit:Tom beat me to it.
Pump Gas 385whp 319wtq
Race Gas 551whp 439wtq
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