Thier are headers for the naturally aspirated Tour as well as the S/C version. I don't know where Derk got his info. Chow how would the 3.0 match the S/C'd power. Mark put down 375 w/ his Tour at the crank. Also the Quaife is $595 plus labor FYI plus the labor is what Chow figured. I'd go S/C all the way.