SZ Series - Suspension Shock Absorber 1991-pontiac-firebird-esi6483971 while the upper control arms

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Designed with cutting-edge features and built from premium USA-sourced materials

The hybrid front coil-over system provides a 0–3" adjustable front drop

UMI’s CrMo brace weighs only 4lbs

When comparing to the Warrior series

SZ Series - Suspension Shock Absorber 1991-pontiac-firebird-esi6483971 while the upper control armsBilstein SZ Series shock absorbers feature a 46mm piston, steel construction and smooth body designed for motorsports applications. These shock absorbers are available in a variety of lengths and standard digressive valve settings that utilize proprietary spring steel valve discs and can be converted to a coilover design (kit sold separately). SZ Series shock absorbers are ideal for racers whose sanctioning rules do not allow or require rebuild