i searched quite abit on turbomustang.com and this seems to be a popular one, pretty cheap in price too. if you wanna spend the $$$ cometics (SP?) are supposed to be pretty damned good as well but they are like $80/gasket
I have used the felpro 8548PT-2, 9333PT-1. Both stood up to some abuse, I just popped the 9333's and went to some ROL hi-temp gaskets with a stainless steel fire ring. ALL N/A with nitrous