I'd start the bolts soaking in PB to make sure they get nice and loosened up when you can work on them again. Straight pipes are ok but can get annoying quick. I rode with a guy in his cheby with dual straight pipes and no cats and it was annoying as f*ck.....
yeah when i did my muffler swap i rode around the city straight piped for about 20 minutes and was already annoyed
I soaked them for about 30 mins with the PB last time so ill probably leave it on longer next time around.
well the idea is to heat up the metal around the bolt to expand the metal without expanding the metal of the bolt.