I have some direct interesting input on this subject. I added the C&L Intake and 70 mm AccuFabTB with a custom tune. The car lost power for a fact, however the dyno didn't show this. I might have opened things up too much as I also did a 90 mm MAS and fuel system upgrades to match the extra air (42 pounders and Cobra Fuel pump). Officially my dyno #'s went up 16 rwhp, to 340 rwhp, however I LOST a solid 1-2 mph at the track. Prior to upgrades I ran 109 mph to 111 mph, 12.7 to 12.8 ET's in the middle of Florida summer and my track runs a few weeks ago in 60 degree temps were very consistent upper 12.9's at 108's with the new TB and Intake Plenum. The track doesn't lie. Anywho, I've got SC setup, and maybe my car is off for what ever reasons, but man am I freaking PO'ed, as I spend about $1500 FOR A SLOWER CAR!!!!!!!! Man did it hurt to type this response.