Does anybody know what kind of plastic the intake manifold is made out of?

 

Plastic...lol. I must ask why for the concern?

 

I don't know, ABS, polypropylene, acrylic, etc.... What would you need to know that?

 

I am designing a intake runner to be used on a single cylinder that will rapid prototyped and the only use ABS which doesn't handle gasoline well. My bet is that it is PP though. This probably should have gone in the general discussion section, but o well.