I have the AFR 185's on my 94' L. I run a 11lb. boost Kenne-bell with it, Bassani headers, Accufab 70mm throttle body mass air, Level 10 trans with a 2500 stall convertor. The heads cut about 3 tenths of of my 1/4 mile time. The great thing about thses heads though is they work great on the street. I'm using Steeda shft roller rockers with them, and they hold valve train geometry perfect and never need adjusting. The finish on these heads is immaculate. I think I paid about $1400.00 for them thru Wynne Speed. The other great thing about them is they are at 59cc chambers. A little more compression but not to much. When I did a clay check on these heads, each chamber was identical. I love CNC machining. KEN