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DriftNDraft · 04-23-2023, 09:24 PM

The GM SC1 sway bar kit is made up of the FE4 sway bars from the SS 1LE and ZL1. It's a matched upgrade for the standard SS with FE3 suspension and summer-only asymmetric size tires.

According to Wildhammer the rear sway bar in the kit has a diameter of 1.181 inches = 29.99 mm. The rear sway bar has one set of holes for the end links. As an aside, the ZL1 1LE sway bar has three sets of holes for adjusting rate.

Diameter isn't the only specification that will determine spring rate, however. Rate is also a function of how hollow the bar is (the wall thickness of the bar). It's a good idea to also make sure that the ratio of stiffness between the front and rear away bars matches the front and rear spring rates and tire grip for the kind of suspension tune you're trying to achieve.

04-23-2023, 09:24 PM	#2
DriftNDraft Drives: 2020 1SS 1LE M6 was 2018 V6 RS A8 Join Date: May 2018 Location: Minnesota Posts: 60	The GM SC1 sway bar kit is made up of the FE4 sway bars from the SS 1LE and ZL1. It's a matched upgrade for the standard SS with FE3 suspension and summer-only asymmetric size tires. According to Wildhammer the rear sway bar in the kit has a diameter of 1.181 inches = 29.99 mm. The rear sway bar has one set of holes for the end links. As an aside, the ZL1 1LE sway bar has three sets of holes for adjusting rate. Diameter isn't the only specification that will determine spring rate, however. Rate is also a function of how hollow the bar is (the wall thickness of the bar). It's a good idea to also make sure that the ratio of stiffness between the front and rear away bars matches the front and rear spring rates and tire grip for the kind of suspension tune you're trying to achieve. Last edited by DriftNDraft; 04-23-2023 at 10:01 PM.