This rating is based on customer reviews, inventory size, pricing, and service quality
Based on recent reviews, AS Muffler in Santa Ana, CA earns 86/100: sentiment leans strongly positive for fast, low-cost exhaust and catalytic‑converter work, same‑day turnarounds, and honest guidance from Francisco/Luis. Many praise clean welds and fair quotes. Common themes: friendly staff, reasonable pricing, quick service, and efficient fixes. Complaints appear in a minority: reports of sloppy welds, poor alignment, a missed oil cap, warranty pushback, and curt attitude—so quality and service can vary. Little detail on inventory variety, yard organization, or part‑finding ease. Expect short waits.
What clients say about AS Muffler in Santa Ana (CA)
Francisco installed the muffler on my car backwards, the muffler tips were not aligned on both sides, the welds were ugly, and several years later the rubber insulation inside a hanger wore out and was rubbing metal on metal. He refused to accept responsibility and fix it, blaming it on the exhaust hitting a few speed bumps (which was obvious and expected because the car is lowered). But he could not explain why the lower corner (and not the upper area which would have taken the brunt of the force) had disintegrated. Another shop said it was shoddy parts. Poor workmanship, not enough attention to detail, and abysmal customer service.
Brought in a prefab kit, and they were able to install it beautifully. Perfect welds and mounting. The advisor made good recommendations and the mechanic did excellent work. I Will be returning for a second project. And I recommend them for your exhaust projects.
AS Muffler exceeded my expectations during my visit today. I came for a fix on my mid exhaust flange connection, and they handled the job with ease, getting the work done with high quality and efficiency. I would recommend anyone who has exhaust issues to use AS Muffler !!
This I would not recommend because product warranty aren't honored. Said my vehicle was a junk and said it had issues. I told nicely that if my car had no issue then I would not be bringing it to his shop. Why replace something that not broken.
Took my car in two months ago and thought they did a great job , had two resonators welded on.
During the time I did notice a smell but didn’t mind it . And just the other day I decided to park my car in the garage when I heard a hissing sound . I went under my car and felt multiple points on welded resonators had leaks with amateur welds so I took it back to there shop. Got there greeted the bald gentleman and let him know my issue . I thought it was going to go smooth since they did weld my resonators . The bald gentleman kept saying they’re fine and didn’t feel anything that I was trippin, so he asked me to step inside shop and show him , (keep in mind he had a sassy attitude All interaction )
I proceeded to show him the leaks with my hand and he still did not want to believe it . So asked his welder Luis to put on the sonarscope and confirmed leaks ! . Owner Told him to tap the holes .
He also did find another leak from a previous weld from a different shop that had similar issue a small hole from a bad weld .(35$ and some bad vibes from owner )
Long story short check shops work if able too before leaving !
Initial customer service 10/10
Secondary visit to get re welded from bad craftsmanship 3/10
Will I recommend place ? Probably !cheap weld cheap price
Would I come back ,nope
Just my honest review
I love taking my car here for service. Francisco, the owner is honest and upfront about any issues I may have with my vehicle. The price is reasonable and affordable. I highly recommend AS Muffer also please and happy after getting my car serviced thank you Franciso and staffs
This is my second time coming here, and both times have been awesome! They have great prices and don’t try to overcharge you. The owner is super nice and honest, which is hard to find these days. The service is fast, and they do quality work. I’ll definitely be back, and I highly recommend them to anyone who needs a good muffler shop!
Came here and spoke to Francisco for a quote to weld a flange into my exhaust because my catalytic converter got stolen and the thieves cut the flange and took it with them. Francisco gave me a good price to get my car up and running again and finally be able to drive it again. I took it in at around 2 pm and was out within 30mins Great job and service from this shop I would recommend to anyone looking for exhaust system work done to go see Francisco at AS muffler
This place has the best prices every time we bring our cars to get fixed we never come back for having issues with whatever the worked on the cars this is the best place u can find in Santa ana
The best prices for catalytic converters in the county, I shop around and couldn't find a better price to replace my Cat and it comes with warranty. Highly recommended .
Great work by Francisco and his team, great prices and quick work. Got a resonator delete with a Y pipe for 170, AS Muffler does good quality work and know how to work on German cars.
I have a BMW m550 and wanted resonators taken off to make the sound a little louder, similar to an aftermarket exhaust but easier and cheaper. Went to a *different* shop and paid ~$400 to swap resonators with a straight pipe. Though it sounded amazing after, I noticed the car rattled and made a terrible noise that became unbearable after a couple months anytime I hit 3k rpm’s. I returned to that shop who didn’t know what was wrong (I had to inform them what was happening) and who then insisted an X-pipe would make things worse, not better, despite all my research. Nice place, but this just didn’t make sense to me.
Wanting a second opinion, I stopped by AS Muffler and asked their 2c. It matched my research - replacing resonators with x-pipe will fix the flapping. Also, it was only $140 (not $400ish). First shop took 2-3hrs. Here took 30min and it was PERFECT.
Highly recommend this place, and I see why the ratings are so good. No nonsense, they seem to have a lot of knowledge, and were completely honest (and accurate!) throughout the process.
Thanks, guys!
Very good place and affordable price took my truck to get a catalic converter and was taken care of good!! Luis very nice and helpful!!! Because of people like him I will return for more services
I went in for my 05 Honda Accord to replace a stolen Catalytic Converter. Francisco took care of me very well and although they were swamped and told me the job would likely be done by the following morning, it was done just a few hours later, on the same day! No haggle lowest price, I called 5 places! Don’t waste your time calling other places, call Francisco here at AS Mufflers 1st ! Super honest and reliable crew. They are all friendly and humble. And they get straight to work. Thanks fellas. God Bless You !
It’s business like this one that im eager to share my thoughts so you (customers) may find your way to AS Muffler. It took us less than 5min to get someone to inspect my muffler from the moment i drove in and from where it is now total time 15-20min. Easy negotiation, resolution and timing where outstanding… Next time you need a muffler service drive down to this shop.
Awesome shop, amazing prices and quality work. Had Audi sport exhaust mufflers installed here on my '17 S8. They helped me swap the valves over, put up with me while we perfected the muffler/tip alignment, and also installed an X-pipe. Very friendly and excellent service and pricing, I'll certainly be coming only here for future exhaust needs. Highly recommend !
Stellar work gentlemen! Honest, priced correctly, quality work. Main qualities that you'd like from your local shop. Francisco and Luis are great! Got quotes from local muffler shops and others were almost twice as much as AS Mufflers. Not to mention in and out service. He did the Flowmaster on my Tundra and what a great job!! That's why I went back so he can help me deter catalytic converter thieves. Taking my wife's car tomorrow to do the same and will continue to do business AND recommend to neighbors.
Had our cat converter stolen from our Honda Accord. Francisco was referred to us by a neighbor who had nothing but good things to say about this shop (granted my neighbor has tried several other shop and has had the best work done here). Sure enough, Francisco took great care of us, got everything we needed to get my car back on the road. He is very professional and also gave me the proper information needed to get our car recertified after this type of work. Did I mention they did the work in under three hours on a SATURDAY! Do yourself a favor and check these folks out...they speak english/ Spanish. Thanks again Francisco
Had our catalytic converter stolen on our Honda. FRANCISCO took great care of us and did the job in under 3 hours on a Saturday! Also very professional in guiding us through the process that we have to take after changing the cat on our car here in California. Check this place out, great and fast service.
I called about a muffler for my 2010 Ford F-150. They had it in stock and installed in 45 minutes. Price was exactly what I was quoted on the phone.
Extremely nice owner and technician.
Don’t hesitate to get your next muffler from this shop.
BEST SHOP EVER. as honest as you can get. spend less than 30 min. paid 50.00.... Another shop quoted me 250.00 for a simple muffler install. i had all the parts. legit COME HERE IF YOU ARE DOING MUFFLER WORK. i repeat COME TO AS MUFFLER..do not even second guess it these guys made my day. AND made my car sound and feel great for a price you simply cannot beat.
Francisco is a friendly guy, and was quick and efficient with his work. Went in for a muffler delete, and less than an hour later, it was done and sounds great! Good service
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