Flowmaster 50 Series HD Chambered Muffler

Part # 853558 Be the first to write a review

50 H.D. Stainless Steel - 3.5 in. Offset In/3.50 in. Offset Out - Moderate Sound

Estimated Ship Date: 06/26/2026

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Advertised Price $302.95

$272.65

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Flowmaster's stainless steel 50 Series HD muffler is designed for today's heavy duty gas and diesel trucks. This muffler delivers improved performance, throttle response and mileage. The 50 HD features a deep, moderate tone with minimal interior resonance and is ideal for trucks with modified engines. This muffler is constructed of 409S Stainless Steel with a 3.5" inlet and outlet, and is covered by Flowmaster's Lifetime Limited Warranty.

Features:

Mild Interior Resonance
Recommended for 6.2L Ford, 6.4L Ram and 6.2L GM Trucks
Improved Horsepower, Torque and Engine Efficiency
Lifetime Limited Warranty

About Flowmaster

Shop the complete line of Flowmaster products for exhaust systems, mufflers, and more that deliver the iconic Flowmaster sound. Available at Holley.com!

Body Height	5.00 IN
Body Length	18.00 IN
Body Material	409 Stainless Steel
Body Width	10.00 IN
Brand	Flowmaster
California Proposition 65	Yes
Category	Exhaust
Clamps Included	No
Color	Black
Emission Code	5
Exhaust Tip Quantity	0
Finish	High-Temperature Paint
Fitment	Universal
Grade Type	Performance
Hanger Included	No
Heat Shield Attached	No
Inlet Connection	Slip-Fit
Inlet Diameter	3.50 IN
Inlet Inside Diameter	3.50 IN
Inlet Location	Offset
Inlet Outside Diameter	3.63 IN
Inlet Quantity	1
Inlet Type	Clamp-On
	Weld-On
Muffler Series	50 Series HD
Muffler Type	Chambered
Outlet Connection	Slip-Fit
Outlet Inside Diameter	3.50 IN
Outlet Location	Offset
Outlet Outside Diameter	3.63 IN
Outlet Quantity	1
Overall Length	18.00 IN
Part Type	Exhaust Muffler
Product Type	Street Mufflers
Reversible	No
Shape	Oval
Sound Level	Moderate
Sub Category	Mufflers
Tunable	No
Universal Or Specific Fit	Universal
Vehicle Type	Diesel
	Truck/SUV
UPC	700042031085
California Proposition 65 Chemical Name	Chromium (hexavalent compounds)
	Nickel (Metallic)
Part Number	853558

This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.

Instructions - Flowmaster Warranty 26 Update.pdf

Instructions - street_applications.pdf

Universal Muffler - Some adaptation may be required.

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*Free Shipping and Handling only offered to the contiguous US on orders over $149, excludes clearance parts and oversized packages.

Some parts are not legal for use in California or other states with similar regulations.

Flowmaster 50 Series HD Chambered Muffler

Flowmaster 50 Series HD Chambered Muffler

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