Description
Aeroflow Performance 4″ Welded Aluminium Full Donut (Part No. AF8610-400)
When standard mandrel bends just will not cut it for your compact engine bay, you need a fabrication solution designed for extremes. The Aeroflow Performance 4″ Welded Aluminium Full Donut (Part Number: AF8610-400) allows you to achieve an incredibly tight radius bend, making it the ultimate building block for custom, show-quality intercooler piping, air intakes, and exhaust systems.
The Ultimate Solution for Tight Clearances
Engineered for car enthusiasts and professional fabricators alike, this full 4-inch aluminium donut lets you cut out exactly the degree of bend you need for highly compact installations. With a tight 0.75:1 radius, it is specifically designed to route your plumbing through the most restrictive areas of your chassis without compromising flow.
Premium T6063 Aluminium Construction
Manufactured from premium T6063 grade aluminium, this donut offers immense benefits over traditional steel components.
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Lightweight & Durable: It is significantly lighter than stainless steel equivalents, keeping your overall vehicle weight down.
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Corrosion Resistant: Unlike coated or painted mild steel pipes, this high-grade aluminium will never rust or corrode, ensuring your engine bay looks immaculate for years to come.
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Superior Welding: Designed with fabricators in mind, Aeroflow’s premium aluminium produces clean, contaminant-free beads, guaranteeing a show-quality weld every single time.
Precision Dimensions for Perfect Fabrication
This full donut features a robust 2.03mm wall thickness, providing excellent structural integrity under high boost or exhaust pressures. Note that this specific full donut is supplied welded on the outside only, ready for you to slice, prep, and weld into your bespoke system.
Key Features at a Glance:
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Custom Routing: Perfect for fabricating tight corners in custom intercooler, intake, or exhaust systems.
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Cut to Size: The full donut design allows you to slice out any specific degree of bend required.
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Premium Material: Crafted from T6063 aluminium for lightweight, rust-free performance.
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Fabricator Friendly: Welds beautifully for a clean, professional finish.
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Thick Wall Construction: Features a durable 2.03mm wall to handle high-performance applications.
Technical Specifications:
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Part Number: AF8610-400
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Tube Diameter: 4″ (101.6mm)
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Wall Thickness: 2.03mm (5/64”)
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Overall Diameter: 243mm (9-9/16”)
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Centre to Centre: 152mm (5-63/64”)
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Centre Spacing: 40mm (1-9/16”)
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Bend Radius: 0.75:1
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Weld Style: Full donut, outside weld only
Take your custom plumbing to the next level with the Aeroflow 4″ Welded Aluminium Donut (AF8610-400). Would you like me to find the matching straight aluminium tubing or silicone couplers to complete your fabrication parts list?
Aeroflow Performance Products has grown to design and manufacture close to 11,000 exceptional quality products. Fittings and hoses, fuel system components, air and oil filters, oil systems, silicone hoses, fabricated tanks, alternators, workshop tools and much more. As a company, they have tried to lead the way for the Performance enthusiast.







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