Selling a pair of Brodix 18° Big Duke Heads fully assembled with 2.470 Titanium intake valves & 1.860 Inconel exhaust valves. These heads are Brodix PB1801 and they were ported by Self Racing. The intake runners are 390cc's and the chambers are 95cc's. They are setup for solid roller and will need TD or Jesel Rockers. These heads originally had O-Ring receiver grooves but they were welded up and machined out. If you are building a big cubic inch motor, these heads make serious power. We can also sell you the TD rockers and have supercharger intakes that match these heads but the intakes were for 11.625 merlin blocks. These heads also have full copper beryllium seats on intake & exhaust. If you were to purchase these heads brand new with everything we are offering here they would be over $7000 for the pair.