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AST Suspension 5100 Series Coilovers (Excludes Front/Rear Top Mounts) (Non Inverted) - 1995-1999 BMW 3 Series 318i Touring (E36) ksport-airtech-pro-plus-air-suspension 1992 BMW 3 Series RWDThe 5100 Series shock absorbers for the 1995 1999 BMW 3 Series 318i Touring (E36) 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