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totalflow 646 mini muffler 409ss 4.5" round width 4" body 6" overall length inner inlet-3.5" outer diameter outlet logo

TOTALFLOW 646 Mini Muffler 409SS 4.5" Round Width 4" Body 6" Overall Length Inner Inlet-3.5" Outer Diameter Outlet Review

39

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Very good

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$$
Revainrating 4.5 out of 5  
Rating 
4.7
🌫️ Exhaust & Emissions, 🛠️ Replacement Parts

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Details

BrandTOTALFLOW
MaterialStainless Steel
Item Dimensions LxWxH6 x 4.5 x 4.5 inches
Vehicle Service TypeCar
Configuration3.5" Inner Diameter Inlet | 3.5" Outer Diameter Outlet

Reviews

Global ratings 39
  • 5
    31
  • 4
    6
  • 3
    2
  • 2
    0
  • 1
    0

Type of review

Revainrating 4 out of 5

So far so good - my new review

Used in place of a dead converter. Kept noise down and fits well. Time will tell how well the finish holds up to the salt on the roads but for now it’s holding up well.

Pros
  • The TOTALFLOW 646 Mini Muffler is compatible with most exhaust systems, making it easy to install and use
Cons
  • The muffler is overpriced compared to other comparable products

Revainrating 5 out of 5

Freaking awesome in my review

These little guys are surprisingly well built and sound pretty darn good. Built a custom exhaust for my RZR That's my feedback.

Pros
  • Welds are very nice and product came as expected
Cons
  • The TOTALFLOW 646 Mini Muffler is made of cheap quality materials

Revainrating 5 out of 5

Used on a motorcycle

I used these to make custom exhaust baffles for my motorcycle and they sound great. Really love the deep growl The outer diameter of the outlet is too small for most vehicles!

Pros
  • Easy to install, excellent construction
Cons
  • The outer diameter of the outlet is too small for most vehicles

Revainrating 5 out of 5

No more Drone and a really great sound

I bought an M5 with the resognator removed and it was too loud! Installed these 12" mini mufflers and now it has a perfect sound. Best of all no more drone.

Pros
  • The muffler is lightweight, which helps to improve your vehicle's acceleration and overall performance
Cons
  • The muffler may create unwanted drone

Revainrating 5 out of 5

Great quality, amazing price.

Perfect size for my racecar exhaust. Quality is excellent, price is amazing. Only slight issue is that the input and output diameters are slightly different, one is a slip over, so beware before you cut.

Pros
  • Automotive
Cons
  • The mini muffler is not legal in all states

Revainrating 5 out of 5

Takes the 'sharpness' out

I have this on a hopped up twin cylinder Briggs engine with a long tube 2:1 header. It does what its supposed to do and is holding up well to almost a year of abuse. Quiet, no, but it knocks the 'edge' off.

Pros
  • Fit the space I needed in the motorhome
Cons
  • The product lacks efficiency and does not provide adequate noise reduction

Revainrating 4 out of 5

Nice loud deep sound

I bought a 10in with 4in inlet, already had a straight pipe on my F-550. This took down the exhaust drone alot on the highway. Still really loud but made a big difference. After installing has nice deep sound.

Pros
  • The inner inlet of 3.5" ensures that the muffler seamlessly fits with your vehicle's exhaust system
Cons
  • The muffler may cause a check engine light error

Revainrating 4 out of 5

Great quality! Outside diameter is 2.157. Thats just 3 mm biggger.

Great quality BUT. its not 2 in and 2 Outlet! it is 2 Inlet 2.157 Out to be exact.3mm bigger size difference. then 2 diameter Keep In Mind!

Pros
  • Works great. Was surprised how good the quality was
Cons
  • The product does not come with sufficient instructions for installation

Revainrating 5 out of 5

small size/ great value

I replaced the resonator on my Jeep Wrangler jk with this. I replaced muffler at the same time so I'm not sure about sound difference but I love the way my exhaust sounds

Pros
  • The muffler is designed to work with a variety of exhaust systems, giving you more options for customization
Cons
  • The muffler may cause the engine to overheat

Revainrating 5 out of 5

Great little glasspack!

Great little glasspack muffler that is perfect for high clearance applications. Other mufflers were to big and kept getting smashed on rocks when off road in my jeep. This sits safely above the bottom of my frame so it won't get damaged

Pros
  • The 6" overall length of the muffler offers just the right amount of sound reduction, without making your vehicle too quiet
Cons
  • The product is not suitable for use in commercial vehicles

Revainrating 5 out of 5

Great size and noise cancellation.

I used this mini muffler on my Polaris 900 RZR to quiet it down a bit. It is a perfect size to fit in tight places. As you can see in the picture it worked out fantastic.

Pros
  • Perfect Fit sounds great thanks would buy again
Cons
  • The TOTALFLOW 646 Mini Muffler is prone to leaks and may cause exhaust fumes to enter the car

Revainrating 4 out of 5

Excellent product for even better price.

Sounds great. Deep tone. Am very pleased with the quality and fast delivery of product. Would recommend to anyone looking to enhance the sound of there vechicle.

Pros
  • The outer diameter outlet provides a stylish look and finish to your vehicle's exhaust system
Cons
  • The muffler is not suitable for use in hybrid or electric vehicles

Revainrating 5 out of 5

Very well built. on my review.

Very well built and packaged blow through muffler. Really mild and quiet at idle and a really nice deep crisp high note at top end performance. Very pleased with it.

Pros
  • The muffler is designed to reduce backpressure in your vehicle's exhaust system, resulting in improved performance
Cons
  • The muffler may cause damage to the muffler mounts

Revainrating 5 out of 5

Great product at a great price.

Made in the USA baby. Great product at a incredible price. Find one of the size you need that's cheaper and made in America.

Pros
  • The muffler is resistant to rust and corrosion, making it ideal for use in wet and humid environments
Cons
  • The muffler may cause a decrease in engine efficiency

Revainrating 5 out of 5

low cost, high value

I am very pleased with this purchase. I have a 2012 Infiniti M37 and decided to do a resonator delete. I also installed Magna flow mufflers in place of the OEM. The result was terrible drone at highway driving. After reading reviews, I decided to give these mini resonators a try. I was skeptical that being so small, how could they make a difference. I also installed an X-pipe and these were mounted right after the x pipe. Wow, what a difference they made. They got rid of that awful drone…

Pros
  • The 4.5" round width of the muffler allows for maximum airflow, ensuring optimal performance of your vehicle
Cons
  • The product is prone to cracking and breaking

Revainrating 5 out of 5

Takes the volume down a tiny notch. Solid item!

Excellent material, solid construction. I don’t think you can go wrong for $15 or so. Even if it lasts for 2 years, it’s worth the $$$

Pros
  • Good piece of kit. Needed something in there to pass visual, and it works fine.
Cons
  • The muffler has poor durability and wears out quickly

Revainrating 5 out of 5

Works perfectly! - my new review

Installed easily and provides a noticeable drop in overall volume and drone. Welds are great and is actually stainless.

Pros
  • The muffler is easy to install, making it a great option for DIY enthusiasts
Cons
  • The muffler is not suitable for use in vehicles with aftermarket exhaust systems

Revainrating 5 out of 5

To be expected. for my opinion

Works great on my 2002 Cummins. Bought a 4” for it just so it could be considered legal. Slight(very very slight) reduction in noise and no tone difference, but was to be expected. Would recommend this product. However, I did receive mine with one slip-on end and one weld-on end which was disheartening. Never the less, I made it work.

Pros
  • The muffler is designed to enhance the sound of your car's exhaust, without making it overly loud or obnoxious
Cons
  • The product does not come with a warranty

Revainrating 5 out of 5

Awesome for state inspection

This product is great if your looking to pass inspection for having a muffler but yet still have a loud exhaust. I put it in a 2005 lly duramax and I didn’t notice any difference over straight pipe. Would buy again

Pros
  • The TOTALFLOW 646 Mini Muffler is ideal for race cars and high-performance vehicles
Cons
  • The muffler may cause a decrease in torque

Revainrating 5 out of 5

Works, sounds great

Liked the 3in id on one end and 3in od on the other. Reversible. Very convenient for connecting as in photo. Sounds great on my 2008 535i, removed drone and vibration. Excellent product and price.

Pros
  • The compact size of the muffler makes it ideal for use in sports cars and other high-performance vehicles
Cons
  • The muffler may cause damage to the fuel injection system