I own a classic 1983 Monte Carlo SS. The car is extremely frustrating when it comes to it's exhaust system. The piping from factory was too tiny, its flow characteristics were terrible, and the exhaust manifolds were awful. So with that being said, I planned on rebuilding my whole exhaust from the engine back. When it comes to installing headers in my car fitment is a HUGE problem. Things need to be adjusted, moved, and messed with. It is NOT an easy job. Discount Muffler did a phenomenal job, did exactly what I asked for, gave me professional opinions and I was completely 100% happy with the turnout. Everything was done correctly, the welds were good, and they even took the time to move my o2 sensor into a better location where it would read my exhaust properly. Would recommend them to anyone who's looking to get their exhaust system worked on.