I've got a few things going on in the shop right now so I haven't had a chance to scrutinize these things too much, but my first impression is that the overall fit & finish, and presentation is pretty nice. Over the next few days I'll try and get some measurements on them, but for today I only had a chance to put one on the bench and see what kind of numbers it put up.

Bore- 4.375
Test pressure- 28"
Intake tested with a radius plate, exhaust tested with and without a flow tube.
Exhaust flow tube diameter- 2"

Lift-----in/ex--ex w-tube
.100--71.6/52.9----52.9
.200-156.1/116.5--125.2
.300-229.3/163.6--174.8
.400-274.8/192.7--213.2
.450-290.5/202.6--226.1
.500-302.9/209.2--238.0
.550-311.1/215.0--245.7
.600-316.0/220.8--251.5
.650-317.9/222.7--254.2
.700-319.7/224.6--259.2
.750-321.6/226.5--261.1