Why Not to Change Your Car's Muffler

Muffler explained and why not to change or modify the one that comes with your car's exhaust system. Why not to change your car's muffler with Scotty Kilmer. Muffler modifications and aftermarket mufflers. Stock muffler vs straight pipe vs muffler delete, which is better? The pros and cons to modifying your exhaust system and muffler. There are advantages to changing a stock muffler, but also a lot of downsides. If you haven't made any major engine modifications to your car and don't plan on reprogramming the car's computer, changing the muffler on your exhaust system isn't a smart idea. DIY car repair with Scotty Kilmer, an auto mechanic for the last 50 years.

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⬇️Things used in this video:
1. Common Sense

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Scotty on Social:

This is the people's automotive channel! Learn how to fix your car and how it works. Get a chance to show off your own car on Sundays. Or show off your own car mod on Wednesdays. Tool giveaways every Monday to help you with your own car projects. Or enter your own car to compete in the Car vs Car contest every Thursday. We have a new video every day! I've been an auto mechanic for the past 50 years and I'm here to share my knowledge with you.

Here's our weekly video schedule:
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Tuesday: Auto repair video
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Scotty Kilmer is a participant in the Amazon Influencer Program.
#savagescotty

[scottykilmer]

⬇️Scotty’s Top DIY Tools:


🛠Check out my Garage to see what I use every day and highly recommend:


Scotty on Social:

[scorpionwins]

Scotty's wife's Lexus= 42db
Scotty's motorcycle= 110db
Scotty's speaking voice= 190db

[craterrr]

I was really thinking on putting a performance exhaust system on my car, and then I watched this video.
Still gonna do it

[bpheta]

Thanks Scotty... im going to remove my muffler now

[DanPellegrino]

Imagine living near this guy?

"Yeah honey, he's outside yelling at the camera again. I don't know he's revving up a motorcycle now? He's yelling more and waving his arms.

[tym]

One acid trip in the 60s and Scotty has been riding the wave ever since

[Jezzz]

With every mod I research or stumble across… this guy is always there to tell us not to 😂
He probably has a point a lot of the time but what a buzz kill!

[mcintosh.motors]

Really depends on the car.. most newish cars’ ECU can adapt to air flow changes such as a full catback exhaust. Changing out cats though can be a different story

[Sakezaf]

No muffler: 110dB, Scotty talking: OVER 9000!

[tyjones]

This guy doesn’t want us to do anything with our cars 😂

[muaythai]

You can change the exhaust without making it louder.

For example install a true dual no crossover exhaust on a V8, and install two separate cats and two separate mufflers.
That way your car didn’t get louder but it sounds much nicer because of the uneven firing V8 shining and showing it’s real character. 👌

[tard]

I also had a catback straight pipe. It never ran bad, if anything it felt like it ran better. I felt a better throttle response and everything. My mpg never went down, never lost any power, nothing. Removing mufflers doesn’t do anything. But removing the cats in most cars does.

[nelsonrodriguez]

Watched this video yesterday.
Installed a muffler today.

[TheRugghead]

If Scotty couldn't talk me out of it,
no one can

[eliforbes]

The ending where he rings the bell is the best part of any of his videos🤣🤣👌literally perfect, damn minty I tell ya😂😂😂😂

[TopGear]

And then theres Scotty, who talks at 130 decibels.

[hunterskeens]

Changed my muffler bout 7 months ago. Still no check engine light. Still runs fine. And sounds great. Plus my O2 sensors are before my muffler so its not messing up anything with the computer cause its stock until the muffler

[AlainHubert]

According to this guy, engineers design perfect cars and we shouldn't do any mods to them. What he neglects to mention is that engineers are also restricted by governmental restrictive emissions laws and rules that don't allow engines to breathe freely. That's exactly what happened in the mid-seventies when engines suddenly lost hundreds of horsepower for the same size. It's like for a human to go biking with a scuba diving mask on.

[King_]

Scotty, youre loud, you need a muffler...😆😆😆

[BeefyWaffle]

I hear you loud and clear Scotty **saws off muffler**