Does anyone know if K&N makes a performance kit for a 1989 s-15 jimmy with a 2.8? I know they make one for a 4.3. Do you think that one whould work? I'm also on the process of putting on a flowmaster 40 series muffler with with 3 1/2 inch tips coming out behind each rear tire. do you think this is worth it. i just trying to get some better "pick-up" out of my 2.8 untill i get a tahoe around the summer time.