My daughter, husband and 4 grandkids borrowed my car to visit family in SC, and it appears the catalytic converter clogged up and now there is an exhaust leak in front of the converter. They are in Columbia SC, with family, but 3 hours from me. The Suburban will run, but will only go about 45 mph. .I got the name of a shop in Columbia." Muffler Shop of Columbia 918 Huger St. Any feedback on this place? Any other suggestions?