I have the super stealths, they take .650 special offset intake rocker, they need a LOT of work to make them flow 330ish CFM @ .700 lift, my car runs good, but there are much better heads out there, if I was to do it over I would get the Trick Flow 240 for my application. My car is not a max effort build, it is a street strip car, so far with traction problems, no tuning yet, 12.03 @ 116 MPH 1/4 spinning, 4100 lb with 3000 ft DA , 512 low deck small solid FT cam, .576 ,248 @ .050 9.5-1 comp.