• All in one backing plate features a built in throttle body support and built in breather tunnels• Tunnels exit at the mouth of the throttle body to create a virtually closed loop system• Backing plate has o-ring breather bolts and a radiused intake manifold• Kit includes a plain aluminum backing plate OEM cover, Team Ness high flow air filter and all necessary hardware• Stage I features a tapered round air filter and a plain plated billet aluminum air filter cover with a smooth design