I just "installed" a Curt hitch on a '07 WRX with stock exhaust and STI tip. The hangers went on fine and TWO of the FOUR frame rail bolts went in like butter. The other two, one on each side WILL not thread. I cannot get them to catch and everything lines up 99.9%
Rethread? Try different bolts, maybe longer? Thread locker? Need some HELP!