Dorman 674-7021 Diesel Particulate Filter (DPF) Clamp

Dorman 674-7021 DPF Clamp

Dorman 674-7021 is a direct replacement diesel particulate filter clamp built to match the original equipment fit and function. It is made from stainless steel for corrosion resistance and long service life, with a manual adjustment design for a precise clamp fit on the exhaust connection.

Compatible with select diesel exhaust applications, including Ford F-250 and Ford F-350 fitment where this specific DPF clamp is required, this part is engineered for dependable retention at the filter joint. The Dorman 674-7021 also cross-references Four Seasons 65834 for the same application.

Key Features

• Direct replacement DPF clamp for OE-style fit and function
• Stainless steel construction for durability in exhaust service
• Manual adjustment type for controlled installation fit
• Bolt-style clamping design
• Specific fit application, not universal
• Natural finish with 21.8 mm band width and 1.5 mm band thickness
• Fits clamp diameters from 230 mm to 245 mm
• Part number 674-7021 for easy identification

Detailed Description

This diesel particulate filter clamp is designed for exhaust hardware replacement where the original clamp has worn, corroded, or lost clamping force. The stainless steel band and bolt-style clamp design help maintain a secure connection at the DPF joint, supporting proper exhaust sealing and alignment. For technicians servicing Ford F-250 and Ford F-350 diesel exhaust systems, Dorman 674-7021 provides a specific-fit replacement that follows the original equipment dimensions and function.

Because this clamp is application-specific, confirm the required diameter range before installation. The manual adjustment design allows the clamp to be set within its specified size range for a proper fit on the mating exhaust components.

What It Helps Fix

• Loose or weakened DPF clamp retention
• Corrosion-related exhaust hardware failure
• Exhaust leaks at the diesel particulate filter connection
• Improper clamping from a damaged original clamp
• Fitment issues during DPF clamp replacement on Ford F-250 and Ford F-350 diesel applications

Installation Notes and Tips

Verify the clamp diameter requirement before installation and compare the existing hardware to the 230 mm to 245 mm range. Inspect the mating exhaust surfaces for damage, rust, or distortion before tightening the clamp. Use the bolt-style adjustment to seat the clamp evenly and confirm the DPF connection is aligned correctly after installation.

Quality Assurance

Dorman manufactures this clamp as a direct replacement part and subjects it to industry-standard testing to support reliable performance in exhaust service. The stainless steel construction is selected for long-term durability in diesel exhaust environments.