New Design Now Shipping!

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. NEW! All lids are now hot-stamped with a contrasting white SLP logo.

Optional Reusable Air Filter

Add either an optional SLP Blackwing or K&N Air Filter for only $57.95, which includes the additional cost of shipping the filter! You can view the details on these filters HERE.

SLP PT# 21044 - High Flow Airbox Lid - 1998-99 LS1 F-Body