Advanced Air Cleaner Systems' 8" Dia. x 12" standard super flow filter with a foam element was designed to be used for short course racing.

´For VW Engines or equivalent
´Prolite Class - 4 Cylinder Engines
´Uni-Filter Oiled Foam Element for
´Maximum CFM on Small Motors
´For Moderate Dust Applications
´Wash, Re-Oil, and Re-Use
´4" Intake Opening
´Inlet Holes in the Housing make this design
´80% more efficient than the the current design.
´Oiled Foam Inner Element and Non-Oiled Foam Outer Element