The R&D 4 Supercharger Sleeve increases the diameter of the supercharger intake to enable the use of a 4" intake filter system. The larger intake increases cubic air volume to the supercharger and decreases air inlet restriction. The R&D Sleeve is a must have for any performance intake. Super charge your supercharger! Order it today. Place your order today with part number Pt. # 613-95044 at the cost of $39.95."
