Manufactured by Air lift | 59209 | 1999-18 GM 1500 SlamAir rear air overload kit for 2 to 6 inch drop, Works with axle flipped or not, fits 07+ trucks as well. SlamAir Adjustable Air Springs for Lowered Trucks (Lowered 4-6 inches), SlamAir fits most lowered trucks with a 2, 4, or 6 inch drop, including trucks with flipped axles and notched frames. Each kit includes everything you need to install the system, and our end caps are made of an ultra high-strength nylon composite which is Product information updated on 2023-03-15