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Looking for aftermarket parts to modify or upgrade your 1990 GMC K1500 with muffler? At Tunersports.com we carry a huge selection of the top name brand performance muffler parts and accessories.
 IN STOCK 12198The MagnaFlow 5 X 8in. Oval Straight-Through Performance Exhaust Muffler 12198 is engineered to enhance your ride with a healthy helping of our signature exhaust sound and dyno-proven performance thanks to its free-flowing straight-through perforated stainless steel core wrapped in stainless steel m... MagnaFlow Muffler Mag SS 14X5X8-3X2.5/2.5 C/D 1988-1993 GMC K1500 Sierra / Sierra SLE / Sierra SLX $162.86 |
 IN STOCK - DROPSHIPS 13266The MagnaFlow XL 4 X 9in. Oval Multi-Chamber Performance Exhaust Muffler 13266 features a straight-through, weight-optimized reversible design with a perforated stainless steel core featuring baffles and tuning gates, enabling it to deliver the powerful signature sound and dyno-proven performance th... MagnaFlow Muffler Trb SS 4X9 18 2.5/2.5 1988-1993 GMC K1500 Sierra / Sierra SLE / Sierra SLX $171.23 |
 OUT OF STOCK 14221The MagnaFlow 5 X 8in. Oval Straight-Through Performance Exhaust Muffler 14221 brings our signature sound and dyno-proven performance to your ride with a free-flowing straight-through perforated stainless steel core wrapped in stainless steel mesh and acoustic fiber fill, and a weight-optimized, rev... MagnaFlow Muffler Mag SS 5X8 14 3/2.5 1988-1993 GMC K1500 Sierra / Sierra SLE / Sierra SLX $214.84 |