AST Suspension 5100 Series Coilovers (Excludes Front/Rear Top Mounts) (Non Inverted) - 2005-2011 BMW 3 Series 320i (E9X) Prelude 1996 BMW Z3 Coupe Roadster

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AST Suspension 5100 Series Coilovers (Excludes Front/Rear Top Mounts) (Non Inverted) - 2005-2011 BMW 3 Series 320i (E9X) Prelude 1996 BMW Z3 Coupe RoadsterThe 5100 Series shock absorbers for the 2005 2011 BMW 3 Series 320i (E9X) 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 adjustment with