I've only ever messed with standard AN hose and fittings. Always seems like there is the need for elbow grease durring assembly. On my new build I ordered PTFE for use with E85. In review, the hose seems a bit more stuff than standard hose, but still makes all the same bends as needed. Assembly is an absolute piece of cake! I mean super easy. -10 PTFE cost me $4/ft, the hose ends are basically the same price as standard AN fittings. Quality is great, I'll be sure to post results after I get some hard miles on them.