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Universal 4" Optimal Flow diesel muffler in black T409 stainless steel for Duramax, Powerstroke, and EcoDiesel engines.

thedieseldudes

4.5 (123)

Universal 4" Optimal Flow Muffler

Name: thedieseldudes Universal 4" Optimal Flow Muffler - Universal 4" Optimal Flow Muffler
Brand: thedieseldudes
SKU: 41618035605548
Price: 150.0 USD
Availability: InStock
Rating: 4.8824 (16 reviews)

4.5 (1,234)

Sold 100+ last 30 days

20% off first order

$150.00

Quantity

Color

Black

Quantity

Description

Feature 4 Inch Material T409 Unpolished
Stainless Steel Inlet Size 4-inch inner diameter Outlet Size 4-inch inner diameter Overall Length 20.25 Inches Body Length 14 inches Body Size ...

Reviews

4.9

17 ratings

4” muffler

Installed the 4” muffler after deleting the truck without the muffler and was a little too loud towing and had a bit of a drone while cruising. The muffler solved everything. Thank you!

Mike · June 8, 2026

Works Great

Does a great job taking the edge off of you think the straight pipe is too loud. Installed easily and gives it a lower powerful growl.

Louis · May 29, 2026

Works amazing. Cut noise in half. Super happy

Damien · June 28, 2026

Delivery & Returns

thedieseldudes

4.6 (4K)

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Description

Feature 4 Inch Material T409 Unpolished
Stainless Steel Inlet Size 4-inch inner diameter Outlet Size 4-inch inner diameter Overall Length 20.25 Inches Body Length 14 inches Body Size ...

Reviews

4.9

17 ratings

4” muffler

Installed the 4” muffler after deleting the truck without the muffler and was a little too loud towing and had a bit of a drone while cruising. The muffler solved everything. Thank you!

Mike · June 8, 2026