Lowering a truck reduces suspension travel and load carrying capacity. AirLift's economically priced SlamAir™ air springs for lowered vehicles can solve these problems. SlamAir fits most lowered trucks with a 2, 4 or 6 inch drop, including trucks with flipped axles and notched frames. Each air spring kit includes everything you need to easily install. End caps are made of an ultra high-strength nylon composite which is as strong as steel, but weighs less and is corrosion proof.