I think meg82 is right...I thought the Tanabe's were loud!!! I'm not sure on an RSX but I thought generally speaking they are pretty loud. Not to keep on dissin, but I also thought the 5zigen was pretty loud. The only exhaust that does a good job on giving a nice throaty low pitched tone was the Greddy. Now I'm not 100% certain but I know for the most part they are pretty quite.