I was using this with my KB but switched to a Systemax 1 lower, so I figured I'd put it up here first to see if anybody here is interested in it. Based on TMoss site I'd guess this flows ~170-200 CFM. I spent the most time on the runners with the dog-legs and used finger calipers to get the short-turns as open as possible. The runners were also extrude honed so the areas that could not be reached with a cutter have been smoothed and opened a bit. The polishing is nice too as you can see in the picture below. I think this lower has had more $$ put into it than any other stock lower ever! I'm asking $100 for it based on the polishing and porting.
**SOLD**
Dam if only it was gt40 style.
How much work would have to be done to a stock HO upper to match the flow of that lower?
Hmmm, not sure - here is what TMoss (the expert on porting stock intakes) says:
There's lot's more info here -> http://www.tmossporting.com/tabid/334/Default.aspx
Ah thanks. I have my eye on a Stang notch near me which might need some *upgrades* ;)