20$apiece. they get brittle after heat&age break at fittings usially. we put 4 new ones on and have`nt run enough to affect them yet.

can you use custom lines? high-temp rubber hoses or something else?

They were easy on both the vert and the AE. You just gotta use a lot of liquid wrench. https://www.nopistons.com/forums/pub...#>/biggrin.png It helps having a thin 13 mm and 14 mm wrench.

I went ahead and bought all 4 lines from Mazdatrix.