3.5"-3" I.D. Reducing Exhaust Pipe Coupler 6" Length

When your exhaust project requires a transition between 3.5-inch and 3-inch piping, the Dynaflex Reducing Coupler provides the professional-grade fit and durability you need. Proudly Made in the U.S.A., this heavy-duty sleeve is engineered for the high-heat, high-vibration environments of commercial trucking and industrial exhaust systems.

Product Overview

Constructed from high-quality 16-gauge carbon steel, this 6-inch reducer features precision-expanded ends on both sides. This "I.D. to I.D." configuration allows the coupler to slip directly over your existing exhaust pipes, creating a secure, overlapping joint that is ideal for both clamping and welding.

• Configuration: 3.5" I.D. to 3.0" I.D.

• Overall Length: 6.0"

• Material: 16 Gauge (.065") Carbon Steel

• Origin: Proudly Made in the U.S.A.

Key Features

• Dual Slip-Fit Design: Both ends are expanded to a true Inside Diameter (I.D.), allowing you to bridge a 3.5" O.D. pipe and a 3" O.D. pipe seamlessly.

• Weld-Ready Carbon Steel: Ships in a raw, unfinished state. This is the preferred choice for fabricators, as it allows for immediate welding without the toxic fumes or cleanup associated with galvanized or aluminized coatings.

• Industrial Durability: The 16GA wall thickness provides superior structural integrity and thermal resistance compared to standard automotive-grade adapters.

• Smooth Flow Transition: Designed with a gradual taper to minimize exhaust backpressure and maintain optimal engine performance.

Specifications Table

Applications

• Commercial Trucks: Adapting turbo downpipes, stack transitions, or muffler inlets.

• Industrial Equipment: Connecting exhaust venting for generators and heavy machinery.

• Custom Fabrication: Building high-flow exhaust systems for agricultural or off-road vehicles.

Tech Tip: For the best seal, we recommend using heavy-duty wide-band exhaust clamps or a full circumference weld. As this is raw steel, applying a high-temperature ceramic coating or exhaust paint after installation will prevent external surface rust.