this mod is great when you have done mods... i noticed a difference, i didn expect anything, but i was really surprised.. but its different for every car
what exactly did it do for you??? and what should it do after being installed???
sound definately improved, the idle was smoother i could tell, when i reved the car it was louder, but when i drove the car i didnt feel nothing, but my headlights are brighter, they seem consistent
after you install this, you should notice improvement in idling (little difference), sound, but what it really does not noticable is just takes a little stress of the engine.. this mod shouldn hurt your car, and its so cheap