The KYB Gas-a-Just rear shock for Mazda2 (2011–2013) is a monotube replacement that pairs an air-free hydraulic piston chamber with a high-pressure nitrogen gas chamber separated by a floating piston. That dual-chamber design aims to preserve comfortable ride quality while delivering more immediate response when conditions demand it. KYB positions the unit as an OE-style monotube alternative.
KYB Shocks & Struts Gas-a-Just Shock Rear Mazda 2 11-13