Is there enough of a difference to spend an extra 420 on AFR165 or 280 on TFS when you can get some aluminum GT40X heads so much cheaper? Doesn't the stock GT40 lower intake only flow 210 cfm anyway unless you port it?
I am looking for a head that has the best all around torque band for daily driver and good performance boost, but I am just not sure the GT40 irons flow enough without some port work.
I am looking for a head that has the best all around torque band for daily driver and good performance boost, but I am just not sure the GT40 irons flow enough without some port work.