Competition Engineering C3310 10-Point Roll Cage Strut Kit Only (Main Hoop Kit Sold Separately) Strut Kit Only for 10 Point Roll Bar Main Hoops. Meets NHRA requirements for cars running 10.99 or quicker with modified firewalls and/or floorboards. Increases chassis rigidity for better reaction times This Strut Kit consists of two door bars, two rear struts, six 6" x 6" x 1/8" steel mounting pads and twelve weld joint gussets. Manufactured from 1-5/8" x .134" wall mild steel tubing and all bends are mandrel formed on CNC equipment Tube ends are notched for better fit and easier installation. Meets NHRA and IHRA requirements Strut Kit comes complete with instructions to ensure a hassle-free installation. Welding is required.