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Message: <blockquote data-quote="vermilion" data-source="post: 1049436" data-attributes="member: 9891">-Pi heads that are ported, milled and valve job on the seats. Leave the swirl dams alone!-Pi plastic intake. -balance the piss out of your rotating assembly.-Not bigger but tighter lsa cams then stock. You dont need the biggest cam a 2v can withstand.-upgraded springs. -flat top pistons for higher compression. 12.x compression is a even start for 93 octane. E85 and meth will allow you to use higher compression. 13.x and so. -long tubes.... Not really a best longtube needed neither. Mac is decently priced and works.Ntk o2 sensors are most accurate. Ngk tr6 plugs are notably worth while...This is not a bible but known to work.Sent by smoke signals</blockquote>