Comp Cams XP Hot Cam. ZZP Sells it. Got a Facebook? I'll show you the difference from a bolt-ons GTP and a bolt-ons GTP with a XP
INTENSE-Racing.com - G8, Grand Prix, Bonneville, Regal, L67 3800 Supercharged Performance Products. sells the S1X cam and it is a great cam too. Not sure if you know this or not but you can't run anything higher than 1.7:1 Roller Rockers with a cam. You gotta either go...Cam, Cam & IC, IC, or Rockers & IC...and headers with all of those setup options