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3" ID to 3.5" OD Exhaust Reducer Adapter – 4" Stainless Steel Coupler
Connect exhaust pipes of different diameters with this 3" ID to 3.5" OD Stainless Steel Exhaust Reducer Adapter. Designed for custom exhaust fabrication, repairs, and DIY exhaust systems, this heavy-duty reducer coupler provides a clean and durable connection between compatible exhaust piping.
Precise Exhaust Adapter Dimensions
Please carefully verify your pipe dimensions before purchasing to ensure proper fitment.
Smaller Side Inner Diameter (ID): 3"
Larger Side Outer Diameter (OD): 3.5"
Pipe Length: Approx. 4"–4.2"
Material Thickness: 0.054" / 1.37 mm
Thickness: 16 Gauge
Tolerance: Please allow approximately ±0.12"
This exhaust pipe reducer is designed to connect compatible 3-inch and 3.5-inch exhaust components.
Heavy-Duty T201 Stainless Steel Construction
Made from T201 stainless steel, this exhaust connector is designed for durability and resistance to corrosion. The heavy-duty 16-gauge construction provides a strong solution for exhaust piping applications.
Unlike multi-piece welded adapters, this reducer features a seamless one-piece construction, helping eliminate potential weak points associated with welded joints.
Seamless One-Piece Exhaust Coupler
The precision-formed design features smooth bends and OE-style routing for a clean connection. The seamless construction provides a durable solution for DIY exhaust fabrication, repairs, and custom exhaust installations.
The edges are cleanly cut, while the inside and outside surfaces are smooth to help provide a neat, professional-looking installation.
Versatile Exhaust System Applications
This 3" to 3.5" exhaust adapter coupler is suitable for a variety of exhaust piping projects, including:
Custom exhaust systems
Exhaust pipe repairs
DIY exhaust fabrication
Exhaust pipe extensions
Exhaust reducer connections
Muffler and exhaust component connections
Automotive exhaust projects
Custom vehicle builds
Professional installation is highly recommended. No installation instructions are included.
Easy Solution for Exhaust Pipe Connections
The reducer-style design provides a convenient way to transition between different exhaust pipe sizes. Its compact 4-inch length makes it practical for a variety of custom exhaust configurations where a diameter transition is required.
Product Specifications
Product Type: Exhaust Reducer Adapter / Coupler
Smaller Side: 3" ID
Larger Side: 3.5" OD
Length: Approx. 4"–4.2"
Material: T201 Stainless Steel
Material Thickness: 0.054" / 1.37 mm
Gauge: 16 Gauge
Construction: Seamless One-Piece
Finish: Smooth Stainless Steel
Package Includes
Important Fitment Information
Please measure your existing exhaust pipe and verify the ID/OD dimensions before ordering. Exhaust pipe dimensions can vary depending on the manufacturer and application, so checking measurements is essential for proper fitment.
If you receive an incorrect size, please measure the product and provide photos so the issue can be reviewed and a suitable replacement can be arranged.
Upgrade your custom exhaust setup with this durable 3" ID to 3.5" OD seamless stainless steel reducer coupler. Its heavy-duty 16-gauge construction and one-piece design make it a practical choice for exhaust repairs, fabrication, and custom automotive projects.