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Message: <blockquote data-quote="fastgtfairlane" data-source="post: 536399" data-attributes="member: 9545"><p>theres a great website for porting the e7s. <a href="http://www.diyporting.com" target="_blank">www.diyporting.com</a><a href="http://" target="_blank">http://</a> if i could give some advice to that is that a gasket match is gonna give you the least amount of gains of anything you can do. you will see the most gains from bowl work and unshrouding the valves. the point of porting heads is really to get the maximum efficiency of the heads and to make every port match and consistant in flow and size. as stated in the website is keeping the same sized valves and reshaping the bowl and combustion chamber enough to unshroud the valves and adding angles to the valves.</p></blockquote><p></p>