WELL SO FAR I HALF MOST OF IT OFF. i was abou to buy the IM gasket($8), TB($2) gasket and Exhaust gasket($13) at pepboys and then remembered that ive heard of "performance" gaskets. is this true and if so which should i get. Also would it be a bad thing to use 2 gaskets to increase the length of the runners or is the difference so small its a waste? thanks