Never heard of them. Are you referring to the flex lines used with the bypass oil filter? Plain old grease gun flex lines with 1/8" pipe threads can be used as filter lines- - - -they're available at any corner parts store, at a fraction of the cost of lines from the online resto-ripoff specialty parts stores. I prefer using hard lines made from copper-nickel tubing to plumb a filter, with a 360 degree vibration loop built in. The only reason for using the flex lines was for ease of installation of the dealer-installed optional filters back in the dark ages.

www.ebay.com/itm/234915015938?

www.ebay.com/itm/202706816547?

Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!