Using a gasket with ports for a stock manifold on a header and head with enlarged ports defeats the purpose of the mod. Who makes a gasket with larger ports? Not Victor Reinz, not Mahle, not FelPro, not Elring. Answering my own question: RMW p/n 113. $15 but it would cost me $20 to get it here. I just took a Reinz steel gasket and, with my Foredom, ground out the port openings to the proper size. Update: Jan personally offered to ship USPS Priority Mail. Much appreciated!