I get the question all the time. "Do I need the BajaRon Sway Bar?" And the answer, of course, is no, you don't need it. The Spyder comes from the factory with a sway bar and your Spyder will go around corners without the upgrade.
It is true that BRP has improved handling of the Spyder over the years. And many customers don't feel the need to upgrade the sway bar. However, I can also say we've had a good number of customers who have ridden thousands of miles on a 2020 + Spyder on the OEM sway bar feeling that they were very happy with OEM handling. Then, for whatever reason, they install the Sway Bar upgrade and say that if they'd known what they were missing, they'd have done it long ago.
My suggestion to those who don't want to upgrade their sway bar... Don't ride a similar Spyder with one in stalled. Once you experience the difference, it will be hard to resist. Especially if you have a rider. Your passenger will notice the improvement more than the driver.