Sounds stupid, but I'm wondering what the stock downpipe from a ihi rhb5 is made out of... it looks like cast iron.

if its heavy and thick its cast iron...or my *****.

the wastegate housing is iron, the downpipe is normal exhaust tubing with heat shields...

I heard MacGyver makes his downpipes from a stick of chewing gum, a paper clip, and a rubber band.

wtf... the thing that bolts up to the turbo that carries the exhaust out... what is it made out of? it certainly doesn't look like regular exhaust pipe.

tin foil

Metal.






(Cast Iron)

That'd be my guess. But Beerbong said MacGyver using gum so I'm stumped.

If it's an ssautochrome downpipe then it's probably made from paper mache