Diesel JD
Full Access Member
Holy crap man! That viton stuff isn't cheap. I don't think they're any at all cheaper than the biodiesel suppliers...ridiculous, but the materials shouldn't deteriorate. I suspect it would still be susceptible to leaks from bumping the return caps like any IDI fuel system though. I'll say this, I wish Ford/IH had gone to the trouble to go with a better return system like the Cummins system.