4in (101.6mm) O.D. 90 de gree Mandrel Bend

The Vibrant Performance 4-inch O.D. 90-degree mandrel bend (part number 13044) is a precision exhaust component engineered for custom exhaust fabrication and high-performance exhaust system builds. Constructed from 16-gauge stainless steel with a 6-inch radius and balanced 6 x 6-inch legs, this mandrel bend maintains tube concentricity and wall thickness consistency—critical factors for minimizing exhaust backpressure and optimizing flow characteristics in custom exhaust systems.

The mandrel-bent construction prevents the flattening and wall thinning that occurs with standard bends, preserving internal diameter uniformity throughout the 90-degree transition. The 4-inch outer diameter accommodates mid-range exhaust systems common in performance automotive applications. Stainless steel 16-gauge material resists corrosion from exhaust gases and road salt exposure while providing structural integrity under thermal cycling. This component is sold individually and requires welding integration into a complete exhaust assembly.

This bend is suited for builders and shops fabricating custom exhaust systems for street cars, performance vehicles, and specialty automotive projects where precision tubing geometry directly impacts exhaust efficiency and sound characteristics. The mandrel bend approach is standard practice in professional exhaust fabrication and represents a measurable upgrade over crush-bent alternatives. Vibrant Performance specializes in exhaust components and tubing systems for the automotive aftermarket, positioning this product within a catalog of established performance-exhaust solutions.

Proper integration requires welding to adjacent exhaust sections. This mandrel bend is a core component for builders prioritizing flow consistency and durability in custom exhaust design and is commonly specified by shops building competition and high-output exhaust systems.