As above. If its power increase your after then forget it. You may gain a few HP but you'll never notice it. If its bling then There are better looking and less expensive variants with as good a build quality. Noise wise I hear the JWT pop is a good'un. I personally have the takeda supplied by Tarmac & have to say its a good piece of kit for the money. Looks good, sounds good, fits well and the cone filter itself is maintenance free unlike other filters which need cleaning/oiling regularly.