We had these heads ported by a local porter for my cousins 5.3L truck. These would be compared to what some call a Stage 1X head. They utilize stock F-body valves with a competition valve job and have full intake, exaust and combustion chamber port work done. These could easily be Stage 2 heads with a jump in valve size to 2.02/1.57. Flow was around 290/220 @ .600, but I will have them flowed again before I sell them to anyone. Some of the F-bodies around here with these heads have run mid to low 11's with lower 22xish style cams @ upper11X mph. I'm not going to say these are the best heads on the market, but they are a good bang for the buck head. I'm looking to get $700 OBO shipped for the heads and valves. Thanks, jason Beast96Z@team.camaroz28.com

 

OBO ttt.