Precision Bends for Custom Fabrication

When you’re in the middle of a custom build, the last thing you want is tubing that won’t cooperate. That’s where 411 Works 6061 Aluminum Donuts come in—engineered to deliver tighter radius bends with consistent wall thickness, giving fabricators the precision and reliability that traditional mandrel bends can’t always provide.

Why Choose Aluminum Donuts for Your Build?

Tight radius bends are notorious for stretching or thinning the tube walls, which can compromise both performance and weldability. By starting with precision-crafted 6061 aluminum donuts, you get perfectly even wall thickness across the bend—making your intercooler piping, intake setups, or custom exhaust projects not only easier to fabricate but stronger and longer-lasting.

Built with Quality in Mind

• High-Quality Material: Made from 6061 aluminum for strength, durability, and corrosion resistance.

• 14 Gauge Wall Thickness: Ideal for welding and capable of holding up to the demands of high-performance builds.

• Tight Radius Options: Perfect for designs requiring compact centerline radiuses (CLRs).

• Flexible Sizing: Available in multiple diameters and CLR configurations to suit your fabrication needs.

Available 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

Each donut is sold as two unwelded halves, giving you full flexibility in your fabrication process.

Designed for Real Projects

Whether you’re fabricating a turbo setup, designing tight-fit intercooler piping, or building one-off intake systems, these aluminum donuts save time and stress in the shop. By starting with a perfectly shaped radius, you can achieve smooth airflow, strong welds, and a professional finish every time.

Get Yours from Select Speed Shop

Our 6061 Aluminum Donuts are available in multiple sizes and ready for whatever project you throw at them. You can pick them up locally in Lowell, MA, or have them shipped straight to your shop. With Select Speed Shop you’re not just buying parts—you’re getting quality components trusted by builders and fabricators who know what it takes to make a project succeed.