Yeah, I am really bored!

But I was thinking...would a plastic (polymer) cat-back exhaust be possible? Polymers have come a long way. There are plastic intake manifolds. I would guess the intake manifold would see similar heat as the cat-back (maybe more). Of course this would be done to reduce weight, but I am not sure of a benefit in cost of manufacturing. After r/d, I would think it would be cheeper to produce.

 

The exhaust get's much hotter then the intake manifold.

Plastic will melt at that range

 

 

You might could use a fluoro polymer (FEP/EFEP/ETFE, etc.) I don't remember the melting temp. Sad since I used to make the stuff.

 

IM doesn't get that hot, especially if you're using a phenolic gasket (Hondata/Outlaw). Exhaust is getting extremely hot gas forced through it continually -- you'd need some crazy expensive plastic to hold up to that.

 

why did I read this?