FWIW:
Dyno tuned and "off the shelf" (as you call it) have much more difference, other than the 1-2 hp gain.

it is .. TUNED (get that.. wow!) for safety to run at those power levels EFFECTIVELY, and without being too lean, etc.

Ray

'99 CSVT - Silver #222/276 In a constant state of blow-off euphoria.
Originally posted by Kremitthefrog:
I like to wear dresses and use binoculars to watch grandmas across the street.