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All I can say is, wow! This exhaust system is outstanding, I ..

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Donaldson Mufflers

Donaldson mufflers provide maximum performance for diesel exhaust systems with an aggressively quiet/OEM sound!

At NWTruckworks.com, we offer Donaldson mufflers to accommodate Dodge, Ford and Chevy diesel pickup trucks with performance exhaust systems, and also the Silent Partner Muffler for Big Rigs. For over 50 years, Donaldson has been a supplier of mufflers, exhaust systems, components, and accessories for medium and heavy-duty diesel powered trucks and equipment. Donaldson is the market leader in heavy-duty mufflers. Donaldson makes over 150 replacement mufflers, including the M100465 – the industry’s most popular Big Rig Over-the-Road truck muffler.

The Donaldson Silent Partner™

is a combination of absorptive and reactive silencing techniques packaged to reduce harsh engine noise generated using an engine brake.

Select your Donaldson Muffler from the table below:

Model	Inlet/Outlet/Length	Diameter	Picture	Link to Product	Exhaust Flow
M085171	4-in/4-in/40-inches	8.5-inches		Buy Now: $103.41	3119cfm at 3"Hg
M090535	5-in/5-in/51-inches	9-inches		Buy Now: $123.48	3260cfm at 3"Hg
M090544	4-in/4-in/51-inches	9-inches		Buy Now: $132.10	2006cfm at 3"Hg
M090781	4-in/5-in/51-inches	9-inches		Buy Now: $126.08	2639cfm at 3"Hg
M100464	4-in/4-in/51-inches	9-inches		Buy Now: $336.17	1420cfm at 3"Hg
M100465	5-in/5-in/51-inches	10-inches		Buy Now: $86.80	2790cfm at 3"Hg
M100466	4-in/4-in/51-inches	10-inches		Buy Now: $145.69	1948cfm at 3"Hg
M100580	5-in/5-in/51-inches	10-inches		Buy Now: $144.13	2530cfm at 3"Hg
M101158 (409SS)	5-in/5-in/51-inches	10-inches		Buy Now: $564.14	2625cfm at 3"Hg
M101159 (409SS)	5-in/5-in/51-inches	10-inches		Buy Now: $563.06	1650cfm at 3"Hg
M101181	5-in/5-in/51-inches	10-inches		Buy Now: $323.02	2625cfm at 3"Hg
M101182	5-in/5-in/51-inches	10-inches		Buy Now: $324.53	1650cfm at 3"Hg

Donaldson Performance Mufflers

Donaldson offers top performance exhaust systems for your sports car. You will not find a higher quality exhaust system in the market, period!

Donaldson Muffler Benefits:

Enhanced sound (quiet yet aggressive)
Increased performance (low back-pressure)
Extended life of the exhaust (up to 500,000 on aluminized exhausts)
Better fuel economy (higher exhaust flow)

Donaldson mufflers provide maximum exhaust flow with a quiet sound!

Click in the links below to watch and hear a video (in a new window) of a Dodge 2004 1/2 3500 with a M090535 Donaldson Muffler (51-inch long, very low back-pressure, 5-inch exhaust). This truck is a highly modified Cummins 325/600, with high flow injectors, torque tube, AFE, CFI intake, custom turbo, MADS Smarty06 stacked with Edge EZ -- this truck develops over 600 Hp and 1300 ft-lbs of torque!

Listen to the aggressive quiet sound: Drive away and return (27M download)
Hear how quiet it is inside: Neighborhood driving (7M download)
Experience quiet while accelerating: Accelerate to highway speed (10M download)
Passing on the freeway: Highway passing (6M download)