hi ive got a 51 plated wrx wagon with a three inch stainless exhaust but it keep coming loose where it bolts to turbo tried tread locker split washer nylock nut but thay still work loose any idears how to fix this

 

it gets to hot up there for the likes of thread lock/nylock nuts. just melts them

I would double nut it.

buy a new set of nuts fit them first. then screw your old nuts onto the studs and tighten them onto the new nuts