Vehicle. 1990 GMC Jimmy 5.7L 350 700r4 TBI Stock exhaust K&N 14" filter with flipped lid. Insatlled ..... 1" TBI spacer 1/4 Pod spacer Result....... Deff throttle response change!Way better! Quicker and alittle more torq. Butt dyno says YES. For the bang for the buck factor Id deff. recommend. I mean I think I paid like $45 for everything on ebay. Easy install aswell.