Notes: Under 8500 lb GVW;w/2.5" Muffler Inlet; If welded Assy, replace all Reqd parts; Up to 8500 G.V.W.R; Optional; SoundFX for 22171;w/2.5" Muffler Inlet; If Welded Assy, Replace All Reqd Parts; Optional; SoundFX for 22171
Notes: Under 8500 lb GVW;w/2.5" Muffler Inlet; If Welded Assy, Replace All Reqd Parts; Optional; SoundFX Universal for 22171; Single Outlet Muffler replaces Dual Outlet Muffler. Use pipe designated as "A" tail pipe.;w/2.5" Muffler Inlet; If welded Assy, replace all Reqd parts; Up to 8500 G.V.W.R; Optional; SoundFX Universal for 22171; Single Outlet Muffler replaces Dual Outlet Muffler. Use pipe designated as "A" tail pipe.
Notes: Under 8500 lb GVW;Over 8500 lb GVW;Replacement Requires Intermediate Pipe;w/3 Inch Muffler Inlet; Replacement Reqs 44461 or 45344; If welded Assy, replace all Reqd parts; Up to 8500 G.V.W.R; Optional; SoundFX for 22719;w/3 Inch Muffler Inlet; Replacement Reqs 44461 or 45344; If welded Assy, replace all Reqd parts; Optional; SoundFX for 22719;w/3 Inch Muffler Inlet; If Welded Assy, Replace All Reqd Parts; Dual Outlet; Optional; SoundFX for 22719;w/3 Inch Muffler Inlet; If welded Assy, replace all Reqd parts; Replacement Reqs Intermediate Pipe; Up to 8500 G.V.W.R; Optional; SoundFX for 22719
1990 GMC C2500 | Base, High Sierra, Sierra, Sierra Classic, Sierra SLE, Sierra SLX | 6 Cyl 4.1 L GAS, 6 Cyl 4.8 L GAS, 8 Cyl 5.0 L GAS, 8 Cyl 5.7 L GAS, 8 Cyl 6.2 L DIESEL