Not sure which 1990 GMC Jimmy Performance Mufflers are right for you? We have over 976 customer reviews, with an average rating of 4.5, to help you find exactly what you're looking for. Here's what some of our customers have said:
"I love my flowmaster they gave me a lot more HP and turns heads on the street i love how loud they are and the tone of them!!!!! But my dad hates them and says i'm a "marked man" by the cops now haha" —Royce P from Silver City, NM bought a Flowmaster 50 Series Delta Flow Mufflers for a 1990 GMC Jimmy.