What does '1.5D radius' mean for this exhaust elbow?

The '1.5D radius' refers to the tightness of the bend. 'D' stands for the pipe's diameter (4 inches in this case). A 1.5D radius means the center of the bend is 1.5 times the pipe's diameter away from the pipe's edge, creating a tighter curve useful for fitting into compact areas.

Why is SS321 stainless steel a good choice for exhaust parts?

SS321 stainless steel is commonly used for exhaust systems because it contains titanium, which helps stabilize the material at high temperatures. This makes it more resistant to corrosion and cracking in the demanding environment of an exhaust system.

What is the advantage of a mandrel bend over a crush bend?

Mandrel bending uses a flexible internal support (the mandrel) to maintain the pipe's round shape during the bending process. This prevents the inside of the bend from collapsing or kinking, ensuring a smooth, unrestricted path for exhaust gases.

Specifications

Brand: Stainless Bros
Part #: 701-10226-4150
UPC: 701-10226-4150

Stainless Bros 4in SS321 45 Deg Mandrel Bend Elbow - 1.5D Radius 16GA/.065in Wall (Leg)

Name: Stainless Bros 4in SS321 45 Deg Mandrel Bend Elbow - 1.5D Radius 16GA/.065in Wall (Leg)
Brand: Stainless Bros
SKU: stainless-bros-stainless-bros-4in-ss321-45-deg-mandrel-bend-elbow-1-5d-radius-16-t14-548490
Price: 97.27 USD
Availability: BackOrder

$97.27

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Stainless Bros 4in SS321 45 deg mandrel bend elbow for custom exhaust fabrication.

Key Features

This is a 4-inch diameter, 45-degree mandrel bend elbow.
It has a 1.5D radius, useful for routing exhaust in tight spaces.
Constructed from SS321 stainless steel for high-temperature resistance and corrosion control.
The tubing wall thickness is 16-gauge (0.065 inches) for good durability.
Mandrel bending ensures a smooth, round interior for improved exhaust flow.

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About this part

Product Details

If you're building a custom exhaust system, you know how important it is to have the right bends to route your piping cleanly. This 4-inch diameter elbow from Stainless Bros is a 45-degree bend with a 1.5D radius, meaning the center of the bend is 1.5 times the pipe's diameter away from the pipe's edge. This tighter radius is useful for fitting exhaust components into tighter spaces under a vehicle.

This elbow is made from SS321 stainless steel, which is a well-known material for exhaust components because it handles high temperatures and resists corrosion well. The tubing is 16-gauge thick, or 0.065 inches, giving it solid durability for exhaust applications. Because it's a mandrel bend, the inside of the curve stays round and smooth, which helps maintain good exhaust flow without restriction.