I have an intake elbow that I need to find a piece of rubber that has a 4 inch ID to connect a pipe to the other end. Where online can i buy these pieces? I tried www.burnstainless.com. They have pieces of silicone that work but they are blue and expensive. Any suggestions?

 

Might try a local big rig repair place. They have elbows and such for the intercoolers and intakes. Don't know if 4" is a popular size, but wouldn't hurt to call them abt it.

 

Oh yeah, might also try a marine shop. Inbd boat engs use something close to 4" hose for the exhaust. It is however VERY stiff and a little pricy.

 

Any industrial rubber supplier should have it in 250' rolls. It is very commonly used in smoke, mist, and grinder dust collection, welding fume extraction, forced ventilation, etc. 4" is a common and popular size. It's generally available from 3" to 12" with a single reinforcement wire.