TOTALFLOW 645 Universal Race Exhaust Muffler - 3 Inch ID | 3 Inch OD

Manufacturer: TOTALFLOW
SKU: 645
UPC: 816264026195

Stainless Steel FinishMay Require Welding JobOne (1) Year Limited Warranty

Availability: In Stock!
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Products specifications
Material409 Stainless Steel
FitmentUniversal Fitment
Reversible MufflerYes
Reversal Muffler Configuration | Bi-DirectionalCenter | Center
Muffler TypeMini Race Design
Inlet | Outlet Diameter - Reversible3" ID | 3" OD
Body Size | Shape4" Round
Body Length4"
Overall Length6"

TOTALFLOW straight through performance exhaust mufflers constructed with 409 stainless steel, our exhaust mufflers designed to allow for maximum free flow—and horsepower. Whether you have a true dual exhaust system or not, our mufflers will make you master the flow & the sound of your exhaust system giving you the max dyno results. Our bullet race exhaust mufflers, resonators and glasspacks can be used off road & can be a great addition to your on road super custom project. TOTALFLOW mufflers feature a straight through, perforated 409 stainless steel core wrapped with 430 stainless steel mesh acoustic material, making it the ideal mufflers for your next custom exhaust project, allowing for a free flow through the pipe with very little restriction.

  • Made from Heavy Gauge fully welded 409 stainless steel muffler.
  • Free flow muffler, straight through perforated stainless steel core wrapped with stainless steel mesh.
  • Minimal decibel reduction over open headers.
  • Perfect for any custom exhaust project.
  • Compact size - will fit anywhere.

Safety Warning

TOTALFLOW® Recommends the installation of this product at professional facility.

⚠ WARNING: This product may contain chemicals known to the state of California to cause cancer and birth defects or other reproductive harm. For more information please go to

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Nice piece
Too small for my app
| 3/1/2020
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Reduces drone
Great quality and reduces drone. I Purchased the 3 in in/out variant and welded it onto my turbo acura integra with a 3 inch turbo back exhaust. My exhaust sounds perfect and no drone while cruising.
| 1/8/2020
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Just what I needed
Good quality, fast shipping.
| 12/29/2019
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Good value
Well built little muffler. Doesnt quiet much, but i didnt expect much. Good value.
| 12/19/2019
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Perfect if you are required to have a “muffler”.
Makes the tech man happy so I am happy. They don’t do hardly anything for noise control, but it’s on a race car so who cares.
| 12/15/2019
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Surprisingly good quality and perfect size
Very happy with these. They filled a size spec that i couldn't find shopping on summit and the build quality is quite nice. They even have a laser etching of which end is the inlet and a nice perfectly round slip fit connection. Welds were clearly done by a machine as uniform and smooth as they are. Purchased to look like catalytic converters and take the edge off an offroad exhaust system.
| 12/10/2019
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Installed on a 2011 Dodge Challenger was everything I expected it to be
| 9/8/2019
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Awesome product
Sounds phenomenal fit great
| 8/24/2019
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Best sounding mini bullet mufflers.
Love the sound.
| 8/14/2019
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Good quality
Nice product. Haven’t installed yet
| 8/8/2019
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Good for the price
Exactly what it says, fit great after weld. No difference in performance but got rid of the annoying drone from my straight pipe
| 7/18/2019
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