One of the more restrictive areas of the LS1-powered F-body performance is its stock air box. All Camaro and Firebirds share the same restrictive air box lid. SLP has the solution for this with its lightweight performance air box lid. This lid eliminates the restrictive baffles at the rear of your stock lid and the power robbing intake air resonator assembly. By eliminating those obstacles, this air box lid will produce a gain of up to 10 additional horsepower at the rear wheels! You can see up to a one-tenth improvement at the track. Add our high performance free flow air filter (Part #25012) for additional gains of up to 5 horsepower.