the stuff brandon is talking about is made by ICORE international, very cool stuff. They are in sunnyvale cal. It can be bent in a very tight radius without kinking. It is a convoluted teflon material, and therefor is extremely resistant to hardening with exposure to fuels. I used this exclusively on my baja off road car. This stuff is also about 1/3 the weight of any other hose ive seen. I dont think i will spend the money for it though on my cummins. A. i could care less how light it is, B. it is very expensive C. i dont have to make any tight bends. D. i dont think the diesel fuel is as hard on the rubber lines as gasoline is. ill probably just go with earls or aqp. my . 02