Bash Autoworx Porsche
“Overall 10/10 experience, I would definitely choose Bash Autoworx again if I wanted to install more mods for my Golf.”
Best Muffler & Exhaust Shops near Diamond Bar, CA
We have 3 technicians in Diamond Bar on file, and all of them are on this list, along with 12 from towns including Pomona (2, 5 mi), Anaheim (2, 11 mi) and La Puente (1, 5 mi).
8 open weekends · all 15 rated 4.5+ · 1 shows a license
Data verified October 16, 2026
Auto Squad DB
“I used to call around to price shop before I bring my cars in, but I stopped because the pricing is get very honest and transparent here.”
Diamond Bar Auto Service & Body
“I went back here and ran into the boss and he did an engine check, told me the issue was my car needed to warm up essentially since we've been having cold weather and explained some other things to me, and sent me on my way with no charge.”
Pomona Gear
“Swapped gears, added True Trac, replaced axle seals, and replaced front hubs when he discovered the bearings were trash.”
Import Auto Clinic
“Within a couple of hours they discovered it was just a loose connection behind the panel and secured it right away.”
Domestic Diesel & Auto Service
“We could not be more happy to have Domestic Diesel on our side, keeping our family hauler on the road and safe.”
Listed for drivers in and around Diamond Bar, CA, 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: Diamond Bar, CA
The 15 technicians on this page are rated from 4.5 to 4.9 across 5,187 reviews; 14 have 50 or more reviews. The topics that come up most in reviews of the technicians on this page are "fair", "honest" and "price". 8 are open on Saturdays. 1 shows a license on its website; 3 list staff certifications (ASE) and 9 have a BBB rating of A or A+. 14 have ten or more years of experience, the longest 74 years. 1 offers financing; 2 give free estimates; 5 are family- or locally-owned and 4 list coupons or special offers. We have a website on file for 13 of the technicians on this page; 8 publish a contact page; 5 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.
Why are some of these shops outside Diamond Bar?
3 of the 15 shops sit in Diamond Bar and the others come from other towns within 15 mi. A shop with a bender and a welder is worth a short drive, since it can repair what a parts-only counter would replace.
B & D Auto Repair
“It's hard to find trustworthy mechanics and these folks are definitely people you can count on.”
小李修車廠 KB Motor
“The car repairman was very nice and patient and helped us fix some minor problems.”
R & N Complete Auto Repair
“Been a client for years, it's always a pleasure dealing with R&N.”
Al & Lee's Auto Care Center
“I love this place there are honest, knowledgeable, professional and the price is very reasonable.”
Yorba Linda Auto Service
“YL Auto Service did not pressure me to do any unnecessary repairs to my car and they were a real pleasure to deal with.”
Community Tire & Auto Service
“They have taken care of me & my daughter for years now.”
Hye Tech Auto Repair
“Decided with this place as they were much cheaper than the dealership and they were very attentive to my needs.”
Ambassador Automotive
“These guys are the bomb, reasonable, honest, and delivered when promised, what more can ask for in a mechanic.”
Master Auto Repair
“He's very honest and trustworthy, does a great job every single time.”
Why these companies made our list
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