Wow, I've been missing out on all the fun..........

2" tube on the exhaust.......28"..........

Lift.............Stock 906..........906 Ported

.100................66/54................89/60
.200.............131/103............161/129
.300.............189/145............212/185
.400.............222/168............257/216
.500.............234/176............297/234
.600.............237/183............331/253
.700......................................347/264

These 906 heads were on our 500" engine when Comp Cams forgot to turn the water on to the engine. It got so hot that the paint was burning off the cylinder heads and all the exhaust valves seized to and pulled the bronze guides out of the heads. The valves were then pounded out of the guides, the guides knurled on the outside and pounded back into the heads, reamed and the valves stuffed back in. With 15 bent valves and 11-56% leakdown it then made 730 HP on 93 octane pump gas. Oh yeah, the heads never cracked and still don't leak water.

Lift......Best OOTB Stealth ever tested.......Fully ported

.100...............73...........................73
.200..............151..........................152
.300..............214..........................218
.400..............245..........................267
.500..............262..........................308
.600..............276..........................337
.700..............281..........................346

With the 2" pipe the Stealth exhaust ports will approach 300 cfm when ported.