Turner Motorsport has spent the last two decades striving for ultimate performance on the racetrack, and transferring the knowledge gained from winning races onto the street. Their line of BMW performance parts combines, high quality, great value, and most importantly, superior performance that will allow you to dial in your ride to suit your driving style and allow your BMW to live up to its full potential. These shock tower reinforcements prevent cracking of the rear shock towers caused by weak sheetmetal and worn shocks. A highly recommended upgrade.