But... I have seen and heard stories of poly tubing melting and warping and making the seal break and not seal to the TB properly. Then you have air leaks.
I always have used steel/aluminum tubing with my air intakes. Poly tubing absorbes heat too. When air is being rushed into the intake and through the tube..the air isnt getting heared up that much. If there is a difference its miniscule.
I recommend the metal tubing. Its sturdier. K&Ns products do jot dissapoint. They are the best for a reason.

This is my opinion...not bashing on anyone or anything. Its all preference. Just giving my two cents.

 

you make good points and I totally agree with you on KN. I stand by them.