UMI polyurethane rear end bushings: stronger, better ride, USA-made. 1999 Pontiac Firebird Vis at 100 degrees C

Vis at 100 degrees C 4

Allows high-temp operation without varnishing valves and clutches

Vis at 4 degrees C

percent Viscosity Loss

These direct bolt-on control arms minimize wheel hop

UMI polyurethane rear end bushings: stronger, better ride, USA-made. 1999 Pontiac Firebird Vis at 100 degrees CUMI offers high durometer polyurethane bushings to replace the factory rubber rear end housing bushings. These bushings are designed to improve ride quality and performance by replacing the worn out and hardened factory bushings. The kit includes two bushings and two washers to prevent lateral movement. Made in the USA, these bushings are a great upgrade for both street and track vehicles.