I used the one that was cheapest, can't remember the alloy. The
more expensive one could be polished to a mirror finish (who cares) and that was
the only advantage as far as I know. I used 2.25" inlet &
outlet. It's still working fine and has all its guts after > 300
hours.
Tracy
----- Original Message -----
Sent: Friday, February 23, 2007 2:59
PM
Subject: [FlyRotary] Hushpower II
Tracy, I see in the catalog that the Hushpower II
comes in T-304 and T-409, which is the most desirable. My old metals
book isn't very clear and from the ad it appears that the T-304 may be the
better one as the T-409 is aluminized. JohnD
Thankyou