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4.00" Tube OD Aluminum Full Round Donut, Outside Weld Only

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Tube Full-Round Donut, Stainless Steel

If you need to fabricate an exhaust header or intake system with tight bends, these 360 degree stainless steel donuts are an excellent way to start. Just cut the donut into whatever angles you need and weld the tubing pieces into the desired shape.*

The 1.75" through 2.25" sizes are 16 gauge thickness. 2.5" through 4" sizes are 14 gauge.

The bend radius (1:1) is measured at the centerline of the tubing. Multiply the tubing OD by 3 to find the donut OD. The donut ID equals the tubing OD.

* Note: The inner seam (along the inside edge of the bend) is not welded at the factory. This may cause binding when cutting the tube. A few tack welds on the inner seam prior to cutting will help to avoid binding of the saw blade. After cutting, finish by welding the entire seam.

Note: At first glance these donuts may appear to be slightly oval-shaped. This is due to the fact that the robotically welded seam around the outside perimeter is not ground down to the same thickness as the base material. There is just a slight bulge on the outside diameter where the weld bead has been robotically ground. The inside of the donut is very close to being a true circle.

Enter desired order quantities below, then click the "Add selected quantities to cart" button.

Order Qty

Part No.

Desc.

Price

Stock Status

1821-1.75-1.75
Condition: New
SKU: 52933

Stainless Fabrication Donut, 1.75" OD, 1.75" Center Radius

1 to 4: $68.79 5 & up: $66.94

In Stock

1821-2.00-2.00
Condition: New
SKU: 52935

Stainless Fabrication Donut, 2.00" OD, 2.00" Center Radius

1 to 4: $71.99 5 & up: $70.04

In Stock

1821-2.25-2.25
Condition: New
SKU: 52937

Stainless Fabrication Donut, 2.25" OD, 2.25" Center Radius

1 to 4: $69.79 5 & up: $67.86

In Stock

1821-2.50-2.50
Condition: New
SKU: 52939

Stainless Fabrication Donut, 2.50" OD, 2.50" Center Radius

1 to 4: $75.59 5 & up: $73.53

In Stock

1821-3.00-3.00
Condition: New
SKU: 52940

Stainless Fabrication Donut, 3.00" OD, 3.00" Center Radius

1 to 4: $90.99 5 & up: $88.61

In Stock

1821-3.50-3.50
Condition: New
SKU: 52941

Stainless Fabrication Donut, 3.50" OD, 3.50" Center Radius

1 to 3: $105.99 4 & up: $103.21

In Stock

1821-4.00-4.00
Condition: New
SKU: 52942

Stainless Fabrication Donut, 4.00" OD, 4.00" Center Radius

1 to 3: $143.99 4 & up: $140.26

In Stock

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Tube Full-Round Donut, Stainless Steel

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Related Product Groups

Exhaust Fabrication Components and Tools

Intake and Exhaust Tubing Fabrication