AST Suspension 5100 Series Coilovers (Excludes Front/Rear Top Mounts) (Non Inverted) - 2003-2008 BMW Z4 2.5i Coupe/Convertible (E85/E86) whiteline-shock-absorber-to-control-arm-bushing 1997 BMW 3 Series 318TDS/323Ti

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AST Suspension 5100 Series Coilovers (Excludes Front/Rear Top Mounts) (Non Inverted) - 2003-2008 BMW Z4 2.5i Coupe/Convertible (E85/E86) whiteline-shock-absorber-to-control-arm-bushing 1997 BMW 3 Series 318TDS/323TiThe 5100 Series shock absorbers for the 2003 2008 BMW Z4 2. 5i Coupe Convertible (E85 E86) utilize non inverted high performance monotube technology. In the past, these were known as the 4100 series. Monotube design shocks absorbers give your car a better performance than the standard twin tube design, the gas pressure is separated by a floating piston, and eliminates cavitation and airation within the oil chamber. The 5100 Series shocks allow rebound