Up for sale my heads off my boat. I had them sold but the guy went another direction. The intake floors are filled/raised to 2.2" tall and flow over 400 cfm @ .700 lift. The exhaust flow over 300 @.700 lift with no cheater pipe. Included is a welded floor Dart 4150 flange intake manifold to match the heads. These heads pushed my non stepped 27" fountain to 98 mph. These heads will work on any 454 cubic inch and up. The raised intake runners produce more torque and the high flow intake and exhaust ports make more power. This concept is nothing new. Our race motor made around 760 hp on a 9.2:1 on Iron Merlin heads in the early 90's In my opinion these are a true marine cylinder head. I can sell these heads and manifold in various stages, starting heads bare with intake for $1,800.00. I can set up the heads with your parts or mine. Here is a video of the gps speedo on muskegon lake MI. http://www.youtube.com/watch?v=e_8c5tyH9VE

If you have any question please call me 616-eight 89-zero928 or [email protected]. Thanks Jim