REDUCER 4in OD TO 3in ID X 9in 1

The REDUCER 4in OD TO 3in ID X 9in 1 is a critical component for custom exhaust fabrication, allowing builders to transition between large-diameter headers or collectors and standard piping. This adapter is essential for maintaining optimal backpressure and flow velocity when stepping down from high-flow 4-inch components to a 3-inch system. Professionals and DIY enthusiasts use this Schoenfeld reducer to bridge the gap in racing applications or heavy-duty truck builds where exhaust scavenging is paramount.

Constructed from durable natural steel, this 9-inch long reducer provides a gradual taper that minimizes turbulence compared to shorter, more abrupt adapters. The 4-inch Outer Diameter (OD) end is designed to fit into or over corresponding tubing, while the 3-inch Inner Diameter (ID) side accepts standard 3-inch exhaust pipe for a secure weld-on or clamped connection. Its length allows for precise trimming or adjustment during the mock-up phase, ensuring a perfect fit within the vehicle's chassis constraints.

This reducer is ideal for those looking to buy high-performance exhaust hardware for competition vehicles or custom street rods. Because it comes in a natural steel finish, it is ready for immediate welding and can be coated with high-temp paint or ceramic after installation to prevent corrosion. Whether you are finishing a turbo downpipe or a custom header system, this Schoenfeld 4030 offers the reliable specifications needed for a professional-grade exhaust modification.