Manufactured by MaxTrac Suspension | 301960C | 2019-23 Silverado/Sierra 1500 C- Section Frame Support, Not tested on Trail Boss / AT4, Adaptive Ride Control and Monoleaf trucks. Does not fit trucks with 8 ft bed, required with 6 inch rear drop, recommended with 5 inch rear drop, Maxtrac lowering kits are comprised of several individual components designed to properly lower your vehicle. The rear lowering can be done by shackles, hangers, flip kits, lowering blocks or coil springs in some applications. No matter which parts your truck uses you can rest assured in knowing that Maxtrac has you covered with the highest quality parts at an affordable price. Product information updated on 2023-11-29. This product can ship by Small Parcel