Originally Posted by DarkJak

Exhaust was fine, though IDK how Stillen's lines up.

I used a wrench inside the bracing on the nut side and hit my wrench on the bolt side (external side) as hard as I could. Also used blue threadlocker. Not ideal, but best I could do with the space. There's no room to turn a wrench, even a ratcheting one, inside the hollow rear bracing piece.