the short answer...the indy sucks for the asking price, they have very poor quality control, the ports are badly matched(and I use that word loosely) to the gasket, if you want a good aftermarket manifold you may want to ask Alan about the one he has...I think its a blackdog unit(cant remember for sure, might be a fast fab unit as well), he wants between $350 and $450 for it..cant remember exactly offhand...ask him, it is a nice manifold though