If you are looking to get more power out of your 'Cadia look into performance parts for the Cadillac CTS with the same motor as our 'Cadia. I had planned on putting in a STS turbo system (for ease of installation) but have found MECH TECH out of California that sells a turbo kit and supercharger kit for the Caddy CTS; waiting to hear back from them. Another company, PCMforless, does computer mods to remove the torque management, raise the speed limiter and fuel cut-off to 7000 (like the caddy engine) but they need my computer from the 'Cadia (for a couple of months) to break the codes. I have been searching the junkyards for the computer, but so far no luck. What I have done to my 'Cadia, so far: K&N filter (33-2919), cut the holes out of the lower bumper mesh (below drivers driving light) and routed my own custom piping to the airbox for a ram-air effect. I also removed the mesh screen from MAF, put in a flowmaster (70 series, not loud) left the rear resonators on for the factory look. So far I've run a 15 flat at 87 in the quarter. I know it's not a race car but I cannot leave well enough alone.