I have a brand new never used TGC (Top Gun Customz) front leveling kit for a NNBS silverado or sierra pickup. I also have a used but in good condition sub box for a NNBS Silverado or sierra crew cab that goes under the seat. The sub box will fit 2 12" subs. I'm asking $70 for the leveling kit and $60 for the sub box. I'm located in The Colony. If you have any questions just call or text me at 214-212-0046.