I had exhaust on my 01 Sequoia upgraded by Boulder muffler more than a year ago and I just cant get over how good this thing sounds. Great business, these guys know what theyre doing. Flowmaster.

Jeff did a fantastic job of getting my drivers side catalytic converter welded up! I no longer have an annoying exhaust leak and it makes my 2003 ML500 sound so much better!!

Jeff is great. I came in with what I thought was an exhaust issue, but he quickly diagnosed it as a heat shield issue. Would definitely recommend his services.

No wonder they have such a great reviews! Had deleted two resonators and straight piped the exhaust. Sounds amazing, quick, and quality jobs done thanks to Jeff.

First rate service. Great job on my very old car.

I was referred here from my regular mechanic, and as other reviewers have said, Jeff at Boulder Muffler is professional, prompt, and well-priced. I appreciated the time he took to answer my questions and how friendly he is. Most importantly- I’m happy my car is fixed. Thanks Jeff!

Very kind, honest, and professional establishment with exceptional quality work. I have had my vehicle serviced here a few times and it is my go to. You will not be disappointed. Highly recommend!

Great experience here. Not only were they fast and professional with my exhaust, they fixed my sunroof which had been malfunctioning for months (free of charge). Excellent shop.

GREAT establishment. Jeff is the best! He was prompt, professional, reasonably priced - and overall, a great person to work with. Thank you, Jeff!

These guys are great. Had my exhaust system replaced within a few hours and were always super nice on the phone. Definitely would recommend.

Jeff talked me through a tough diagnosis (bad cat) and offered practical, straightforward, and budget-conscious advice on the best course of action. Highly recommended!

I almost forgot to reward one of the most reliable repair shops during our entire 12 month trip through USA with a clear recommendation!- Boulder Muffler did a fantastic job,- We were promptly given a last-minute appointment- We followed his tip to the nearby breakfast café- and after three quarters of an hour and an enjoyable breakfast the end pieces of our exhaust were perfectly renewed.Thanks a lot, Jeff!

I’ve wanted dual exhaust for my tundra for a while now. I finally pulled the trigger and Jeff was really helpful. I didn’t want crazy sound but enough to notice it. Jeff and his team did amazing work! Thanks again!

Highly recommend. Instead of having to replace the entire exhaust system,they were able to salvage my mufflers and just replace the rusted out sections of pipe. Very reasonably priced.

Jeffs the man! My Subaru showed up in pieces after another shop looked at it and he sorted it all out and got me back on the road the same day. This is quality work at a fair price so if you need exhaust work (especially with the new emissions standards for 2021) go here.

Jeff at the team at Boulder Muffler are excellent to work with. Great communication and speedy service. If you need muffler work this is the place to go in Boulder!

Great place to get exhaust work done! Very professional and good quality work! 10/10

Great muffler shop here in Boulder. Jeff is very professional. Very happy with my experience

Top notch service and expertise,fairly priced and reasonable turnaround

Fast, courteous, great prices, and overall a good experience

Great shop - fixed my too loud and droney performance muffler with a much better one at a good price.

This place is good hes always willing to try and work with me even though I bring in my own part and still have to have him customize or modify add or delete stuff. I really appreciate him always helping me out. Thank you.

I had bumped my muffler on a bad speed bump. I took my car (Subaru Outback H6 3.0) to my regular Hoshi Motors (they are amazing too - 5 stars to them too). They recommended me to go ahead and visit Jeff at Boulder Muffler. Jeff was awesome, gave me a perfect estimate for the job and got it done within hours - pretty much what you need. The car looks great and I thank Jeff and Co. @ Boulder Muffler for a great experience.

Awesome service! Took my race truck in early in the morning and Jeff did an amazing job building an exhaust to fit around all my lines and suspension pieces. Best part is he was done by mid-afternoon so I was able to pick the truck back up the same day. Definitely bringing every future exhaust job to Boulder Muffler.

Came in without an appointment, Jeff said he would fit me in the schedule. 3 hours later everything was sorted out and my exhaust was fixed. Very affordable and great service would recommend this place to anyone I know.

I needed a complete dual exhaust system on a unique old car. Jeff installed a complete new custom system (an it was a tight fit) and did a very professional job. Usually you get what you pay for, in this case I think I got more than I paid for. I highly recommend Boulder Muffler.

Excellent exhaust experience always! Ive taken five vehicles here and Id take five more back.

Blown away with the price, time, and quality of work. strongly recommend

Great customer service, excellent work and willing to put up with pain in the butt customers like myself. Thank you guys!

Was referred here by Super Rupair and had a really good experience. Jeff is super easy to do business with. I will be back for any future work I need.

Jeff is a true craftsman of his trade. Straight up honest, hard working business owner totally knowledgeable of I would think all aspects within his profession (exhausts and exhausts systems).Bring him what you got; (concerns, needs or a situation),he will look at your vehicle, tell you what is going on and what it might take to rectify it correctly as well as alternatives. This was my experience- Thank you Jeff-2002 gmc sierra dual exhaust

Jeff is the go to man for exhaust and catalyst work

Jeff has crafted several exhaust jobs for me, from small pieces to full systems. He is very professional, knowledgeable, and trustworthy, and his work is always top-notch and great value.

Just found my new local muffler shop.Thanks again!

Jeff is great. He did an excellent job of installing an entire exhaust system on my car. It was done in the amount of time he promised and the price was very fair. Jeff runs the type of business I like to bring my car to for service; ie friendly, excellent workmanship and fair prices. I will be bringing all my future exhaust needs to Boulder Muffler.

Simple, honest, and easy.I drove 1800 miles to Boulder with some crazy issues. Im fairly maintenence oriented, but Jeff laid it all out straight and easy. Explained the issues, offered multiple solutions, had 2 different problems fixed, and charged a fair price. Everything was taken care of exactly as I would like a process like this to go.Would definitely recommend.

Boulder muffler has helped me achieve my exhaust and performance modifications. What a good shop with an honest owner who I’ve called even after leaving the town I grew up with questions. Thank you so much!!!

This has to be one of the best mechanics out there. Jeff is genuine, honest and fast. I have never felt so comfortable having someone work on my car. I will recommend him to all of my friends and family. You will not be disappointed or taken advantage of!

I’ve been using Boulder Muffler for over 10 years. Jeff have done work on all 4 of my BMW’s and not once in this time period I’ve been left disappointed. Highly recommend 👍🏻

My catalytic converter was actually stolen from my car and the people at Boulder Muffler got everything replaced in just a couple hours. Great service, thank you!

Jeff and Boulder Muffler are amazing, and we couldnt recommend them more highly. He went above and beyond to make sure that our Honda Element was ready for California inspection when we needed a new catalytic converter right before we moved. This level of service is hard to come by these days, and were really glad that we decided to bring our car to Boulder Muffler.

Top notch expert

Jeff was a pleasure to work with and did a great job rerouting my Tacoma exhaust for better ground clearance. Timely and fair.

Excellent work and always personable, Jeff is your Exhaust Pro, and he is certainly mine. Highly recommend. Thank you Jeff for your hard work for me and my repair shop over the years and taking care of all my referrals.I highly recommend this Exhaust Repair Shop over any other in Boulder and the surrounding communities. This is your go to place for Exhaust Repair, take from a Colorado and local area native, and someone in the automotive repair business Boulder Muffler is the place I recommend.

Wonderful experience. I saw 5 stars in reviews so I called Jeff on a Friday morning and explained that my daughter’s car was leaking exhaust into the interior. He said bring it this morning and I’ll fit it into my schedule. Completed by 3pm! And at a very fair price!

Boulder Muffler is by far the best exhaust/ muffler shop in town. Not to mention Jeff is one of the best guys in town! You will get high quality service at a fair price. I wouldnt think about going anywhere else. Highly recommended!!!!

Jeff was awesome. He thoroughly inspected our family vehicle and gave us an honest report. As a recent transport from MN I feel confident in honest and quality repairs with Jeff and Boulder Muffler. Thanks for everything and we will be selecting you for our vehicle repairs going forward.

Took my 2009 Subaru WRX here for a muffler/resonator delete. Jeff got the job done (and done very well) within 4 hours of bringing the car to him without an appointment! Fantastic work! Totally recommend Boulder Muffler and will bring any future project cars here first! Thanks Jeff!

Awestruck with my first experience here yesterday, quite possibly the best experience with a mechanic ever. Quick, polite, affordable and in a good location. Thanks Jeff!

This guy knows his stuff I had a 19 Yukon and he recommended the best fitment for it and sound and it is amazing good guy to work with Very clean shop I can trust with any of my vehicles

Excellent service. Jeff handled my tailpipe repair super quickly and efficiently for a very fair price and with great honesty and integrity. I highly recommend Boulder Muffler.

I have been going to boulder muffler for 15+ years a truly great company!

Very good service, fair price and fast.

Excellent service and top notch quality work

Jeff was great! Got the work done fast, professionally, and at a fair price. Really appreciate the help!!

This guy ROCKZ!!! I strongly recommend anybody who needs Muffler work go here to get it done, the workmanship is top-notch and the customer service is warm and welcoming and the lines of communication are always open!

Jeff is great at what he does, friendly, honest, fair pricing, extremely proficient.The best exhaust shop I have ever dealt with.He is a wizard at bending pipe and making recomendations for unique applications.And he has a great first name :-)

Great service. Jeff was friendly, honest and professional. I called him in the morning with some extensive work needed to be done. He had it back to me by the end of the day while keeping me posted on progress along the way. And, the cost, although not cheap, it was lower than I expected. Big thumbs up!

Ive known Jeff for 14 Years and I have taken all my cars to him for exhaust work he has never failed me. His welds are perfect and his bends are exact. Jeff always gives a great price cheaper than any other shop in Colorado. I will always bring my vehicles there and I will always recommend Jeff at Boulder Muffler.

Great place to go! Very friendly. Only does the work that needs to be done. Reasonably priced.

Told them i needed it done before 12 for the next day. Got it back 3hours earlier. Its been one year and the weld is still looking good. For a Rsx type s with skunk2 RR exhaust. Best place to get your exhaust system install

Good pricing and fast service! My Jeep needed an overhaul and Jeff got things done very quickly! Love the sound of Magnaflow!

My exhaust and been rattling and was making weird sounds, brought my vehicle into another shop and they recommended a full exhaust replacement (which wouldve been quadruple the amount I ended up paying at Boulder Muffler) or to bring it to a exhaust speciality shop- Chose to bring it to boulder muffler because of the great reviews, which I can substantiate. I showed up first thing in the morning and he was able to give me a quote, which I thought was reasonable for the work. He called me about 3 hours later to tell me all the work was done! I was very happy with the price, speedy service, and professionalism. Highly recommend

Have been in the area about 7 years as a mechanic and trust Boulder Muffler more than anyone else around. Extremely professional, trustworthy, kind, and also very timely! You wont leave here disappointed!

Top notch muffler shop! I usually like to work my cars, but not muffler work. I took my car in because the the flex pipe was rusted out and had a hole in it. I originally took it to my mechanic for an estimate and it was going to cost around $400 - $500. I ended up going to Boulder Muffler. Within an hour of dropping the car off they confirmed the flex pipe and within 2 hours of dropping it off they had the pipe fully replaced for less than $200!Im very satisfied with their work and would recommend them to anyone. They do great work, are honest, and friendly.

Needed to get a couple flaired ends on my J10 jeep to fit my new headers.There was only two welds but he did a fantastic job. It only took a few hours and only cost $50, not bad at all.Plus his welds looked fantastic. I work in stainless steel manufacturing and his welds are really good. If I ever need any more work done there is no question I will be back.Thanks again.

Boulder Muffler did a great job on my 2001 4runner. They came highly recommended, and I can see why: Theyre professional, affordable, honest, and fast! I cant think of a reason to go anywhere else.

My catalytic converter has been failing for years but with the new smog regulations, I didnt pass this year. I tried my usual mechanic; he wanted a fortune to do the job. Another mechanic wanted a more reasonable price but recommended I try Boulder Muffler to save some money and time. Boulder Mufflers price was beat both of them and the service was incredibly speedy. 24 hrs after failing smog, I passed with flying colors and was out a lot less cash than I feared (it was still expensive, but hey, thats two catalytic converters for you). Definitely trying Boulder Muffler *first* for exhaust work in the future!

Had two different cat-back kits in two different cars installed by Jeff within less than 6 months apart, and the work done on each one is why I will continue on supporting independent shops! In those two different instances, I dropped my car(s) off early morning and got it back by afternoon-ish the same day, which is superb considering how busy Jeff is. Both installs have been going strong thus far, no rattles, no CEL lights, and just overall a good mount/install. Very fair pricing also. Jeff is the best in town, great guy too!

Ive worked for a local auto repair shop for the last ten years. We send all of our exhaust work to Jeff including our personal cars. Hes a perfectionist and he charges a fair price. I highly recommend him.

Best auto repair experience I have had . More than once. Honest, straightforward, good work, and timely without up selling.

Used Boulder Muffler again this week, and must say, what a great job! My Jeep came out perfect, and finally, motivated me to leave a review. A+++

We got a muffler and some exhaust pipe put on our 01 Honda CR-V for $300. Now after paying the $300 bill, our crv will not start. Jeff was very nice and referred us to the mechanics in his same building. Slipstream auto is in the same building and said that they can charge us $70 for a half hour to look at our crv in the morning. It seems very weird that we could drive our crv to Boulder Muffler twice today, did not have any issue starting our car, had a muffler replaced at Boulder Muffler, drove back to Boulder Muffler to pick up our crv; the crv would but start and now the mechanic shop which shares garage bays with Boulder Muffler is willing to charge us for a half hour of work for $70. I will expect both mechanics shops which share the same garage bays to figure this out and make this right for us without charge.

I ran over some debris and ended up needing some extensive exhuast work, including a new catalytic converter, Y pipe (whatever that is), etc.. Nissan dealership: $1250. Boulder Muffler: $600. Car has run PERFECT since Jeffs good work. Trust In Jeff. This place rocks.

Seems like a decent guy and zero bs.

Like all the others, quoted me $200 less than Midas and other shops. Speedy, helpful and very nice. Recommend highly!

Great shop. Work was completed before I expected. Jeff is knowledgeable and helpful and took the time to explain why I needed what I needed for my 19 1986 Toyota Micromini RV.If you need exhaust work for an RV, this is the place to go. Calling around I found out that no other shop in Boulder had a lift for an RV and I was pleasantly surprised when I found all the positive reviews for this shop.For about $850, replacing the exhaust, catalytic converter, and associated pipes turned my rolling roadblock of an RV into something that could actually get onto the freeway and keep up with traffic. Was happy that Jeff also gave me a warranty for the catalytic converter as well. I would highly recommend this business for your exhaust work.

Boulder Muffler is my go to when it comes to exhaust. Performance or repair. Jeff is the nicest and most honest guy you will meet, and you cant beat the pricing!

Upfront, honest, prompt service, and good prices for solid work. Cant really go wrong with Boulder Muffler.

Jeffs strategy is clear: be cheaper, faster, more thorough, and more honest than anyone in driving distance of his shop.

Fast service.Fixed muffler that everyone else said needed to be replaced.

Best service I have received in this town. Honest and not out to just make money off you.

I feel compelled to leave this glowing review for Jeff at Boulder Muffler. As stated in other reviews, I am very particular with my cars. To a point of obsession. I typically tend to bring my cars to very specific people when not performing the work myself.And with that I found this gem of a shop in Boulder CO. Well worth the drive from anywhere in CO, Jeff listens and is willing todo most any custom high-end to repair work you have.When needing custom work done to my Audi, I dropped by with specific exhaust tips and gave him details of what I wanted done. He made the process so worry free and nailed it, just as I dreamed! Since I have brought him more work for my other car and 1.5yrs later can vouch for his quality.Thanks Jeff! You do great work and are a blessing to this community!

I took my 2003 Grand Am in to get a catalytic converter replaced. I was told it would take 2-3 hours to replace it. Since I was from out of town, that meant I would need to kill that amount of time. An hour later I receive a call from Jeff saying the repair was complete! He realized I would be inconvenienced so he serviced my car first.This is exceptional customer service and I was very pleased to see this.BTW, the car has its old acceleration back!

Jeff is honest as the day is long!! Trust this guy with all my vehicles! I called to ask the cost to replace my catalytic converters for my 2013 Tundra, 65k miles....he referred me to the dealer cuz it’s under EPA mfg mandated warranty...80/8yr...any owner, any vehicle after 1995. the dealer said 60k/6yrs! Sooooo, Jeff just saved me $2200! Thank goodness for honest ppl! Of course, I had to prove it to the dealer by going to EPA website. This shop deserves 10 stars.

Pretty Good price, took 2 hours but my car has been sputtering ever since I got my mufflers replaced

Jeff did a GREAT job on my Dodge Durango when I needed exhaust work and he did it at a fair price !!!! VERY HAPPY.

Excellent, no-nonsense service at a fair price. I was in and out in less than an hour.

Great place for muffler or custom muffler work..

Great work, EXCELLENT welds and reasonable price! Thanks Jeff!!!

Best to go to a muffler shop when you have a muffler problem. They are specialists getting things done efficiently and for a good price.

Very professional and affordable

Great work, honest prices

Great work, cheap price

Highly recommended!!