Boxing in the subframe is the best way to enhance the handling characteristics of any vehicle. If you look at the front subframe of the B8 Audi A4 and S4, you’ll see a “U” shape with the opening at the rear. So when you accelerate, brake or go into a corner the suspension pushes against the subframe, causing each side to flex independently. While the factory tried to box in the rear to reduce flex, the low-cost stamped steel stabilizer is mostly useless for high-performance handling. Manufactured from billet T7 aircraft aluminum, the Alu Kreuz one-piece design reduces flex, effectively unifying the front suspension for better handling and performance. $399.95
EuroCode Tuning, Inc.
Taking the knowledge and expertise that built the popular FMDV007P bypass valve, Forge Engineering designed the FMDV008, the next evolution in bypass valve design. Designed from the ground up, the FMDV008’s more compact layout features a new internal piston design, faster response and improved airflow. Fully serviceable and customizable, the FMDV008 bypass valve includes three springs and shims to precisely calibrate the valve to any boost level. Available in a stealth black or gunmetal gray anodized finish, the FMDV008 comes with a limited lifetime warranty. $185