This is more of a question for guys running Forced induction as this type of intake tubing provides more regidity against collapse, but is anyone familiar? 100mm or 4" diameter only.

I found a couple links below but I'm not sure if it's the best product, but gives a good idea what I'm looking for.

I"m not sure this would be good for an Auto application.

http://www.usplastic.com/catalog/cat...ookie%5Ftest=1

This place only sells in bulk out of the U.K....very expensive.

http://www.m-p-c.demon.co.uk/revotec/mpcflexhose.html

 

Looks like dryer or return air hose? Have you check with your local Home Depot, or a heating and air condition place. I am sure you can find something at either of those places.

 

mc master-carr they have everything and anything