The Bilstein B4 are high quality replacement gas shock absorbers that have been engineered and manufactured specifically for the E46 318i, which enjoys a lighter motor than its stablemates. This means that the damping rates are fine-tuned especially for this engine and chassis combination, allowing for significantly improved driving dynamics as well as longer life. Made in Germany by the very best in the industry, these shocks will vastly improve the way your BMW rides and handles due to their design and use of high quality componentry. The perfect solution for most people, they will restore the finesse and ride back to the way your 318i felt when it first rolled out of the factory.