^^^If you go back and read what I wrote in my last post you will see that I said the JDM DC w/ 2.5 inch collector is the best "bang for the buck" however, it will not come close to the power the other headers I mentioned will make. You will be better off spending the 500 and getting the RMF, IMO. From someone who has a JDM DC 4-1 header and is saving to get an RMF.