Westport Autohouse
“Mike and his team were able to identify the problem with my Mercedes GLK350 that the dealer couldn't identify.”
Best Muffler & Exhaust Shops in St. Louis, MO
21 technicians listed · all 21 in St. Louis · 7 open weekends · 15 rated 4.5+
Data verified October 19, 2026
Greg's Auto Service and Repair
“Been extremely satisfied with service and truly appreciate not having people trying to "upsell" unnecessary items.”
STL Auto Care
“St Louis Auto Care is ran and operated by wonderful human beings who are always hardworking, friendly, consistent,trustworthy, and fair with the services they offer.”
Franklin Specialist-Nissan
“Honest mechanics that do better and more efficient work than the nissan dealers at much better pricing too.”
Jamco
“Staff is always friendly and knowledgeable, I trust only them to provide quick and cost-effective service for my car!”
Spirit One Automotive
“I made an appointment for tires and brakes- they were prompt and did a great job!”
Listed for drivers in and around St. Louis, MO, these 21 shops handle mufflers, pipes and catalytic converters. What each one says about welding, custom work and warranties comes from its own website; ratings and quotes come from public reviews.
Area overview: St. Louis, MO
All 21 technicians we list here are in St. Louis itself. We have 25 technicians in St. Louis on file; this page shows the highest-rated 21. The technicians on this page are rated from 4.0 to 5.0 across 2,825 reviews; 17 have 50 or more reviews and 15 are rated 4.5 or higher. When customers rate these technicians on specific qualities, they most often praise quality (88%), professionalism (83%) and value (83%). The topics that come up most in reviews of the technicians on this page are "fair" and "honest". 7 are open on Saturdays and 1 on Sundays. 3 list staff certifications (ASE) and 10 have a BBB rating of A or A+. Domain records put 5 websites of the technicians on this page at ten or more years old; the oldest dates from 1997. 1 offers financing; 2 are family- or locally-owned and 2 list coupons or special offers. We have a website on file for 9 of the technicians on this page; 7 publish a contact page; 2 list a public email and 1 takes bookings online. We count these figures across the technicians on this page; hours and prices change, so confirm the details with the technician before you visit.
Midas
“Clay and Carlos helped me get my air conditioner working again when someone else tried to make me replace a part I didn't have to that was going to call extra $300.”
Claude's Auto Services
“Have already told all of my friends that if they need repairs, Claude's is the best!”
Nat Automotive
“Nat quickly diagnosed the problem and completed the repair the same day.”
A Plus Autocare
“Brought my car in for an oil change and they had me out in no time.”
King Auto Repair
“The employees at the shop are very knowledgeable from my 1971 Chevelle to my 2011 Charger the service has been impeccable and timely.”
I-70 Performance
“Fix my friends car at a fraction of the price and it's still running better than when she bought it.”
Gravois Auto Repair
“I have gone here for minor things in the past and just had my damaged control arms replaced (I blame the STL potholes).”
NAD Motor LLC
“Really helpful with getting my flat tire fix even when they were just closing.”
Saint Louis Hills Auto Service
“Her explanations are detailed and as even though I don't know very much about automotive repair, she breaks it down in a way that makes sense.”
Sal's Auto Care & Detail
“They were so busy and the mechanic immediately came out, inspected, and fixed it.”
J & J Cylinder Head and Auto Repair
“Wonderful customer service upfront pricing very pleased with service provided definitely will you use this service again”
Almir's Automotive
“Is willing to help and give you the best he can at a reasonable price.”
Kunkel's Mufflers
“He's one of the best, if not the best mechanic that I've ever met.”
Sunset Auto Services
“My mom had some solid work done after a recommendation, said they were honest people that communicated well and charged a fair price.”
Quality Auto Repair & Sales
“They always get me in quickly and get the job done without trying to get more money out of me.”
Why these companies made our list
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