Shop MagnaFlow Performance Exhaust Systems for the 1998 GMC K1500 Suburban, including cat-back exhaust systems for select engines, trims, and configurations. Engineered to produce MagnaFlow's deep signature exhaust sound, these systems feature premium materials and easy direct-fit installation. 1998 GMC K1500 Suburban exhaust options include 3.5-inch main piping diameters; polished exhaust tip finishes; single passenger side rear exit styles. Use Shop by Vehicle to find the system for your K1500 Suburban.