Is it worth doing this mod on the 09-10's and for the ones who have done this what kinda of numbers are you getting (any MPG gains or noticeable hp)....Lastly will this mod void your warranty?

 

There was one member that dyno'd his truck before and after and saw no measurable gain. I don't know if it would void your warranty, you could just put it back before going to the dealership. Best I can tell is it makes your engine area louder but no concrete evidence of any performance improvement.

 

1-2 mpg gain. at least thats what I saw.

 

Is this an annoying noise in your opinion? Well hell I guess I will just try it out and see. Thanks to you both.

 

I never did it. I don't like doing mods unless there is a guaranteed gain from it. And the only person to post hard evidence posted that there was no gain from it. Eveyone else just said it "feels" faster or it "sounds better" not worth it in my opinion.