Originally posted by C500HP
Brian, we have worked with Bob on a few sets of heads that worked very well. The prices were very affordable, and the results were impressive, such as the setup in Ryan's WS6, which made well over 440 rwhp and 390 rwtq with our custom ground cam.
I have to make a correction in your post though, because the "XXX" heads are from Felber. While our shop hasn't established an "Exclusivity" contract with Felber yet (which we will be honored when it comes to that), Mike has designed an "Exclusive" line of heads to suit our every need. What that means is this line of multi-level heads will be sold exclusively through Rx only, and not be available through another shop.
Anyway, I'm looking forward to being a sponsor to TR again, if they give us the green light. At that point, I will go into the finer details of our projects, and different levels of engine packages for the LT1, LS1, LS6, and LS2. 
YEAH...What Dan said.
Felber
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"Horsepower is all in your HEAD!"