the k&n on injected vehicles is best dirty indeed. The old carb 2.3is the ones that need clean to be efficient. Injected is a big slob waiting to suck in alot of unnecessary Bigness for *nothing* but consumption. Be sure filter is on the other side of maf, the k&n can gain a chemistry being oiled, sucking into whatever type maf electrically functioning may not like it. I wouldn't use a k&n on injected anyway...but it is a popular choice, like a nice shiny chrome air intake snorkel waiting for maf lightning