391 belt on the G4

[Dooitorbust]

Can I run it for a spare or am I just asking for trouble?

 

[Bnorth]

I'd run it as a spare but it won't last as long as the 531/571 so it would be more of a finish off the day easily and get back to the truck sort of thing.

 

[Caper11]

Nope give er. My buddy has run 391’s on his 17. And a 391 on his 19 turbo. If your worried about it he will probably buy it off you.