Dear Welder Series… will I need a sway bar with triangulated four link?

Dear Welder Series…
I have a quick question relating to the rear axle/ triangulated four-link:
Will I need a rear sway bar in addition to the triangulated four-link set-up? I see conflicting responses online, and figured you may have the best answer.

Dear A…
Depending on who is doing the defining, a sway bar might refer to an anti-roll bar (shown below):
or a Panhard bar (shown below):

Our sway bar/anti-roll bar is designed to resist the tendency to lean when in a turn. A Panhard bar keeps the frame centered, with some tolerance, between the tires and has a minimal effect on the tendency to lean in a turn.A Panhard bar, or some other location device, is necessary when a parallel rear 4-link is used because the bars themselves don’t offer much resistance to left-right chassis movement. (Left-right movement is different from leaning or rolling left to right.)

The triangulation of the bars resists the left-right movement when a triangulated rear 4-link is used so a Panhard bar is not required.

I hope this is clear.

Thanks for asking.

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