These are the real deal when it comes to modified cylinder heads for the 2.7L V6. We have taken the stock cylinder head, reconfigured the intake and exhaust port and came up with some awesome flow numbers. We have taken the stock flow numbers of the intake side at 185cfm to 237cfm @ .400 lift. and the exhaust side from 150cfm stock to 212cfm @ .400 lift. The heads comes complete with 1mm over stainless intake and exhaust valves, titanium retainers, and NGM competition valve springs. The valve job consists of a Serdi multi angle valve job with the addition of unshrouding of the valves. The heads are thoroughly cleaned, resurfaced, bluprinted and assembled. The heads were set up to flow well with the addition of our Stage II cams. If you are looking to make big power numbers with your 2.7L, you need a good flowing set of heads, so look no further.