Belltech bolt-in C-section kit for 2001–2006 GM C1500 with a 5.25" frame uses a wrap-around notch to capture the rail, increasing rear suspension travel and reinforcing frame strength on aggressively lowered vehicles. The application-specific kit includes a notch template, Grade 8 hardware and progressive polymer bump stops, and typically restores about 2" of compression travel while requiring frame modification.
Belltech C-SECTION KIT 01-06 GM C1500 STD W/5.25inch FRM