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Weldon Spring Automotive
“I had a not-so-common problem to fix and their knowledgeable staff, and quick and friendly service got me back on the road the same day!”
Best Muffler & Exhaust Shops in St. Charles, MO
15 technicians listed · 6 in St. Charles · 1 open weekends · 14 rated 4.5+
Data verified October 19, 2026
K & B Performance
“Kevin the owner is a great guy, he helped me by finding a creative solution to replacing a $950 third brake light!”
Zeisler Automotive- Saint Charles
“Great friendly service, got my truck in for State inspection and got me taken care of quickly.”
Lucky Omen Garage
“Great customer service and took care of my vehicle in a timely manner.”
St Charles Foreign Car Inc
“He's always been fair, excellent, and 100% quality with his maintenance and repair work, I've never had to go back for issues with his work.”
Craigs Customs
“They got my Corvette in and fixed while I waited and did a great job with the exhaust repair.”
Listed for drivers in and around St. Charles, MO, these 15 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. Charles, MO
Of the 15 technicians we list here, 6 are in St. Charles itself and 9 come from towns including St. Peters (2, 5 mi), Florissant (2, 10 mi) and St. Louis (2, 18 mi). The technicians on this page are rated from 4.3 to 4.9 across 3,836 reviews; all 15 have 50 or more reviews and 14 are rated 4.5 or higher. The topics that come up most in reviews of the technicians on this page are "price", "honest" and "fair". 1 is open on Saturdays. 2 list staff certifications (ASE) and 9 have a BBB rating of A or A+. 12 have ten or more years of experience, the longest 63 years. 2 offer financing; 5 are family- or locally-owned and 5 list coupons or special offers. We have a website on file for 13 of the technicians on this page; 10 publish a contact page; 3 list a public email and 2 take bookings online. We count these figures across the technicians on this page; distances are straight-line, and hours and prices change, so confirm the details with the technician before you visit.
Can I book an exhaust job online with shops listed for St. Charles?
An online booking link appears on 2 of the 15 listings here. Most exhaust work is short enough to be a same-week appointment, though a converter or a full section may wait on a part arriving.
Westport Autohouse
“He's pretty honest on what your car needs and what it doesn't and he's always quick to remind you that if you don't treat your vehicle right (especially the European brands), you'll be in for some pain.”
Greg's Auto Service and Repair
“Greg is friendly, reasonable, and reliable.”
Western Tire & Auto
“Got in quickly and got an emissions test completed.”
Sigmund Auto Service
“This was the third shop that had looked at my vehicle for this same problem and Sigmunds finally fixed it.”
Florissant Garage & Radiator
“They buffed out my headlights which were turning yellow!”
Complete Auto Repair
“Will definitely be back and recommend to friends.”
Complete Auto & Exhaust
“Quick and friendly service, I 100% recommend them.”
Gary's Automotive
“This is the first time I have ever gone to Gary's and it was a pleasant experience.”
A+ Auto Repair
“Excellent service and honest and affordable service , mechanics were honest and straightforward,,”
Why these companies made our list
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