So wait Neil you're building from the head all the way down or just
from the collectors down? You said "90 deg pipes" plural from
"manifold " to collector... are you referring to primaries from the
exhaust flange to the collector there? Or it the jetta system a 4-2-1
style exhaust or something?

With mild steel you should be able to find 1.5D bends(1.5x the
diameter of the tubing, which yields a 3" CLR or center line radius
which is how "tight" the bends are).

Jim Akiba

On Thu, Mar 27, 2008 at 12:01 PM, neil N <musomuso@gmail.com> wrote:
>  Short run of 1 5/8" 90 degree pipes from manifold to collector, then a
>  "J" pipe forward, around, and back to stock Vanagon cat and muffler.
>  OR an aftermarket cat and muffler with 2" inlets/outlets.
>
>  After the collector, the Jetta is 2" pipe.
>
>  What is the diameter of exhaust pipe on the Vanagon?
>
>  Can anyone direct me to a quiet good sounding, good fitting after
>  market muffler?
>
>  And how "tight" a bend can be made (mandrel bent) on 2" aluminized steel?
>
>
>
>  Thanks!
>
>  Neil.
>
>
>
>  --
>  Neil Nicholson. 1981 Air Cooled Westfalia - "Jaco"
>
>  http://web.mac.com/tubaneil
>  http://tubaneil.googlepages.com/
>