Camaro/Firebird 98-2002 SLP Air Lid Gain up to 10 rear-wheel horsepower with an SLP high-flow air-box lid. This bolt-on unit eliminates the restrictive stock baffles and resonator assembly, significantly improving air flow to the throttle body. Use our high-performance air filter (Part #25012) for up to 5 additional horsepower. Item # 98-99 LS1 21044 2000-02 LS1 21045