PROGRESS Technology Sway Bar Kit | 2013-2021 Subaru BRZ/Toyota 86/Scion FR-S (63.2136)2013 2021 Subaru BRZ Scion FR S Toyota 86 Sway Bar Kit by PROGRESS Technology How do PROGRESS Technology's anti sway bars dramatically improve handling? They minimize the traction robbing body lean that rolls part of the outside tires off the pavement. The company's sport tuned sway bars replace the smaller diameter OEM bars and rubber bushings with larger diameter (stiffer) alloy steel bars and polyurethane bushings. More roll stiffness means less