When you're buying flexpipe... if you want to do it right get the flexpipe with the braided inner and outer.. better for flow.

In the picture above you can see how the flex is ribbed on the inside.

Note that the braided inner and outer is a good deal more.

04 Subaru WRX "Eurosport bling bling fast and furious tokyo drift" "They have diarrhea of the mouth, and constipation of thought"