i have one on my accord and it makes a noticeable difference then my short ram did, mine is a two piece. it only took me about 10 minutes to install, it was so easy. im sure it doesn't give as much gains as an AEM but its close enough. sounds better than my short ram too. i need to get a new filter on it, but i have other things on my list of stuff to buy before the new filter. i think im gonna put my friends ractive heat shielded filter on there temporarily until i get get a K&N and a fender liner, i need to something to protect it from water a little.