411 Works Aluminum Donuts Unwelded | 6061 Aluminum | Fabrication Components Overview The 411 Works Aluminum Donuts Unwelded are precision-crafted components designed for custom fabrication projects, including intercooler piping, intake systems, and other performance applications. These donuts allow fabricators and Subaru enthusiasts to achieve tighter radius bends with consistent wall thickness, overcoming the limitations of traditional mandrel bent tubing. Sold as two unwelded halves, they provide flexibility and ease of use for custom builds and repairs. Manufactured from high-quality 6061 aluminum, these donuts are engineered to maintain structural integrity and provide a smooth, consistent surface for welding with minimal preparation. The 14 gauge wall thickness ensures durability while facilitating strong welds. 411 Works focuses on delivering components that meet the demanding needs of performance fabricators, making these donuts a reliable choice for Subaru owners looking to enhance or customize their vehicle’s intake or intercooler piping. For Subaru enthusiasts, especially those working on WRX, STI, or BRZ platforms, these aluminum donuts enable precise and clean bends that improve airflow and packaging efficiency. Their tight centerline radius options allow for compact routing in engine bays where space is limited, helping maintain optimal performance and reliability in custom setups. Features & Specifications This 411 Works Aluminum Donut is engineered for custom fabrication and performance piping applications, featuring 6061 aluminum construction and a 14 gauge wall thickness. Designed to provide consistent wall thickness and tight radius bends, it delivers durability and ease of welding for Subaru enthusiasts seeking precise and reliable fabrication components. Brand: 411 Works Product: Aluminum Donuts Unwelded Part Number: 411-ADUN4 Fitment: Universal / Custom Fabrication Material: 6061 Aluminum Finish: Raw Aluminum Construction: Precision CNC Cut, Unwelded Halves Origin: Not Specified Wall Thickness: 14 Gauge Center Line Radius Options: 2" - 2" CLR, 2.5" - 2" CLR, 2.75" - 2.2" CLR, 3" - 2.3" CLR, 3.5" - 2.5" CLR, 4" - 2.8" CLR Quantity: Sold as 2 Unwelded Halves Key Benefits Fabrication Precision: Maintains consistent wall thickness for reliable welds and structural integrity. Tight Radius Capability: Enables compact, smooth bends in tight engine bay spaces common in Subaru WRX, STI, and BRZ builds. Material Quality: 6061 aluminum offers excellent strength-to-weight ratio and corrosion resistance. Ease of Welding: Smooth surfaces reduce prep time and improve weld quality for custom piping projects. Versatility: Multiple centerline radius options accommodate a wide range of custom fabrication needs. Custom Fitment: Sold as unwelded halves for maximum flexibility in assembly and fitment. What's Included 2× 411 Works Aluminum Donut Halves (Unwelded) Installation & Compatibility Installation of the 411 Works Aluminum Donuts requires welding skills and appropriate tools, making professional installation recommended for best results. These donuts are universal components intended for custom fabrication projects, so fitment depends on your specific application and design. No modifications to the donuts themselves are necessary, but precise measurement and alignment are critical to ensure proper fit and flow in your Subaru’s intake or intercooler piping system. Professional Installation: Recommended Modifications Required: None to the donuts; welding and fabrication skills required Verify Compatibility: Confirm sizing and radius fit for your custom project and Subaru platform Shop with confidence at Subimods—your Subaru parts specialists.
