heads are clean ,crack free,cnc ported bare castings[never been run since porting was done].they have 95cc chambers for med. compression pump gas strokers. valve job is cut for 2.250 intake valves and exh is cut for 1.760 exh. valves. intake port volume is 290cc and they flow 350/220 with pipe @.700 lift.they have bronze guides,and are milled flat,machined for screw in studs,ready to assemble.heads like these made 702 HP on a 518 stroker. heads bare are 1195.00, for more info contact,ronrobart@embarqmail.com.