^ I'm not sure on the flow numbers personally myself... I would have to ask my brother...

My brother has been talking to the machine shop that does all the machine work for the chevy dealership. It's the same shop where he sends heads off to get checked all the time. They know my brother pretty well since he is the only one that really works on LS motors at his work and he talks to them at least once a week... so they quoted him that price for the work...

I'm still waiting on the reply from them to see if we can put some 2.00 intake valves and 1.55 exhaust in there as well without sacrificing in losses.. I'll keep you informed on how it goes.