So, I really hated the fact that every time I went on the freeway I would get great speed, but when I was driving on local roads, that speed just wasn’t there. But then I was at the shop talking to my buddy mechanic, and he said that what he did for his BMW e46 was buy this new heat shield offered thru signaturemotoring.com and that it got him the speed he wanted. I decided to buy it too because it sounded like good idea. It was actually! Its fantastic, it’s a lot better than the cheap-o ones they have at the stores, the quality of this one is a lot better and it actually creates, what they call a ‘box’ effect, so the hot air REALLY doesn’t get to the engine, and all I get is cold air. I recommend that ya’ll get it, it’s a real good investment.