Originally Posted by Rich Browne

--
The C6 is an improvement over the C5. The C5 was a solid motor - the C6 is a fast/solid motor. Scott has been running C6's since March of last year. Very impressive. Play with Header and Pipe combos - loads of hidden power. Try RB's 2013 pipe with the matching conical manifold - I wrenched for Rody (and Scotty, too) in Vegas last October, Rody's comment on our set-up: "That is just brutal power". Too bad Rody's battery pack broke in the main.
The Xenon R's are faster - but, sensitive to tune. The C6's are powerful - and very easy to tune - just a "tick" slower.
thanks Rich...
I was not happy with the black crankcase C5 Rody. My old C5 Rody,Aluminum crankcase with "rody" sig on the case will smoke the black case. the black case has no bottom end that is why I am skeptical on getting the C6. I like the old aluminum case with lot's of bottom and very good top end. I am hoping the C6 will be as good.