ISC Suspension 06-11 BMW 3 Series E90/E91/E92 X-Drive N1 Basic Coilovers - Street

The ISC Suspension B005B-4-S Basic Coilover Kit Street Sport is a high-performance coilover system designed for BMW 3-Series xi/AWD (E9X) models from 2006-2011. These coilovers are ISO9001, 2000R Certified, and ARTC Certified, ensuring quality and performance. They feature 32-way damping adjustability, allowing for simultaneous rebound and compression adjustments. The basic upper top mounts are made from T6061 anodized aluminum with isolated rubber bushings for improved road compliance. The piston design incorporates high rigidity steel rods, valved according to the spring rate and tested with a shock dyno for consistent results. The mono-tube damper utilizes high-pressure nitrogen and a larger cylinder and piston design for enhanced driving stability. The threaded portion of the shaft is powder coated and salt spray coated for durability in various road conditions. The ISC springs are made from SAE9254 steel, tested over 500,000 times with less than 5% deformation, and offer customizable spring rates. The coilovers provide full-length height adjustability of up to 3 inches, with high-quality T6061 aluminum alloy used for all adjustment locks. Preload and ride height adjustments are separate, ensuring consistent ride quality regardless of ride height.