:: CLOSED LOOP T-BAR CROSSBAR ADAPTER. Helix Heavy-Duty Universal T-Bar Kits Are Designed to Convert Loop-Type Adjustable Shocks to T-Bar Mounts. Whether youre looking for a new front end for your daily driver, or adding the final touches to a show car, Helix has a full line of Suspension Steering and Braking components that are perfect for your project.