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Mild Steel Tube Full-Round Donut

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If you need to fabricate an exhaust header or intake system with tight bends, these 360 degree 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 mild steel construction is economical and easy to weld.

Sizes 1.5" through 2.12" are constructed of 16 gauge tubing. Sizes 2.25" and 2.5" through 5" are 14 gauge. Size 2.37" is 20 gauge.

The bend radius 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. You must weld it closed after you cut the donut to the desired angles.

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

Order Qty
Part No.


Mild Steel Fabrication Donut, 1.50" OD, 1.50" Center Radius

$47.99In Stock


Mild Steel Fabrication Donut, 1.62" OD, 1.62" Center Radius

$49.99In Stock


Mild Steel Fabrication Donut, 1.75" OD, 1.75" Center Radius

$50.99In Stock


Mild Steel Fabrication Donut, 1.87" OD, 1.87" Center Radius

$50.99In Stock


Mild Steel Fabrication Donut, 2.00" OD, 2.00" Center Radius

$52.99In Stock


Mild Steel Fabrication Donut, 2.12" OD, 2.12" Center Radius

$64.99Not In Stock
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Mild Steel Fabrication Donut, 2.25" OD, 2.25" Center Radius

$85.99Not In Stock
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Mild Steel Fabrication Donut, 2.37" OD, 2.37" Center Radius

$85.99In Stock


Mild Steel Fabrication Donut, 2.50" OD, 2.50" Center Radius

$85.99In Stock


Mild Steel Fabrication Donut, 3.00" OD, 3.00" Center Radius

$93.99In Stock


Mild Steel Fabrication Donut, 3.50" OD, 3.50" Center Radius

$106.99In Stock


Mild Steel Fabrication Donut, 4.00" OD, 4.00" Center Radius

$137.99In Stock


Mild Steel Fabrication Donut, 4.50" OD, 4.50" Center Radius

$137.99Not In Stock
notify me when available


Mild Steel Fabrication Donut, 5.00" OD, 5.00" Center Radius

$174.99Not In Stock
notify me when available
Related Product Groups
Exhaust Fabrication Components


by PowerReviews
Mild Steel Tube Full-Round Donut

(based on 1 review)

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Exhaust donuts

By Motorman

from Boise Id

Verified Buyer

Comments about Mild Steel Tube Full-Round Donut:

Great product and shipping time

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