I just recently bought this really cool heat shield for my bmw e30 and I swear it’s the best thing since sliced bread. Now on local streets my car drives really fast and I really like it. But when you’re buying one of these make sure you get it from signaturemotoring.com because they make the ‘real’ ones, you know, none of that crappy stuff and it keeps all the hot air away from my engine. It makes this things around the engine so none of the hot air goes in, its just cool air so my car runs great now. Definitely a great investment