I think some of the price you pay for with the TF heads is tied with quality. When we read all the garbage found with bad QC with a head like SM, or even Edelbrock lately, people say "where is the QC ?" Well, some don't like to pay for it. When you want a high quality head, it cost. So the price of TF heads isn't just in how much MORE horsepower they make vs a Eddy RPM head, but the quality as well. You don't NEED a Snap-On ratchet to get the bolt loose. You can get a duracraft for a 1/4 of the price.