Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great.

I installed this air filter in my Cobalt SS with a modded air box, main reasons were to rid myself of the stock paper filter and hopefully add a few horsepower. I'm not going to sit here and tell everyone that it gives huge horsepower gains, honestly I don't know and the butt-dyno felt little to no difference. However, the sound has improved some and it's hard to ignore the benefits of a lifetime air filter. Sure you probably need to buy K&N's cleaning supplies but besides that this filter can be cleaned and reused time and time again saving money each time you would have purchased a new filter. This product is made for the stock Cobalt SS air box, the modifications done to mine in no way affect the installation or fit and finish of this product.