When I see BIG starting numbers like this it raises LOTS of questions about flow bench calibrations.

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


I have had a lot of Stealth heads on my bench and when I test I test EVERY port on every head. The most I have ever seen was 267cfm. Start with high numbers end with high numbers and those in the know, know better.