Dorman 903-305 Exhaust Clamp - Converter To Muffler

Dorman 903-305 Exhaust Clamp for OE-Style Repair

Dorman 903-305 is a standard replacement exhaust clamp built to match the function of the original equipment clamp on specified vehicles. It uses an aluminum construction with a natural finish and V-band clamping design to help maintain a secure connection between exhaust components.

Compatible with select Cadillac Escalade, Chevrolet Silverado 1500, GMC Sierra 1500, and Yukon applications, this clamp supports converter-to-muffler exhaust connections where a 3.50 in. clamp is specified. The Dorman 903-305 is a direct-fit exhaust hardware solution for repair work that calls for a specific OE-style clamp design.

Key Features

• OE-style exhaust clamp for specified vehicle applications
• Aluminum construction with natural finish
• V-band clamping design for secure exhaust joint retention
• Specific fitment for converter-to-muffler locations
• Maximum diameter: 3.78 in.
• Thread diameter: 0.125 in. with 70 mm thread length
• Cross-reference part number: 20779890

Detailed Description

This exhaust clamp is engineered for vehicles that require a 3.50 in. clamp at the converter-to-muffler connection. It is a direct replacement for the original equipment style used on applications such as 2011-2021 Cadillac Escalade, 2011-2020 Chevrolet Silverado 1500, and 2011-2021 GMC Yukon. The V-band design helps create a tight, serviceable connection between exhaust system sections while the aluminum material supports corrosion resistance in everyday exhaust service.

Dorman 903-305 is a practical choice for exhaust repair on Cadillac Escalade, Chevrolet Silverado 1500, and GMC Sierra 1500 platforms where the factory clamp design and dimensions must be matched. Part number 903-305 also cross-references 20779890 for the same application.

What This Part Helps Address

• Loose exhaust connections at the converter-to-muffler joint
• Exhaust leaks caused by a worn or damaged clamp
• Service issues when the original clamp no longer holds proper tension
• Fitment problems when a specific V-band clamp design is required
• Replacement needs for OE-style exhaust hardware on listed GM and Cadillac vehicles

Installation Notes and Tips

Verify the vehicle’s exhaust connection size and clamp style before installation. This part is listed for converter-to-muffler positions only and is specific to the applications shown. Confirm the 3.50 in. clamp requirement and inspect mating exhaust surfaces for wear, distortion, or damage before securing the joint.

Quality Assurance

Dorman manufactures this clamp from quality materials for reliability and OE-style function. It is a standard replacement exhaust hardware part designed for specified fitment and consistent service use.

• Fits 2011-2021 Cadillac Escalade, converter to muffler
• Fits 2012-2021 Cadillac Escalade ESV, converter to muffler
• Fits 2018-2021 Chevrolet Tahoe, converter to muffler
• Fits 2011-2021 GMC Sierra 1500, converter to muffler
• Fits 2011-2021 GMC Yukon, converter to muffler
• Fits 2015-2021 GMC Yukon XL, converter to muffler
• Fits 2014-2020 Chevrolet Cheyenne, converter to muffler
• Fits 2011-2020 Chevrolet Silverado 1500, converter to muffler
• Fits 2013-2020 GMC Sierra, converter to muffler
• Fits 2016-2019 Chevrolet Silverado 3500 HD, converter to muffler
• Fits 2011-2014 GMC Yukon XL 1500, converter to muffler
• Fits 2011-2013 Cadillac Escalade EXT, converter to muffler
• Fits 2009-2013 Chevrolet Suburban 2500, converter to muffler
• Fits 2009-2013 GMC Yukon XL 2500, converter to muffler
• Fits 2009 Hummer H2, converter to muffler