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I edited my original post of HP/torque. I had subtracted the 11HP gain from my baseline and quoted 337 stock HP. Actually the baseline was 348HP with 359.3 HP after the installation. The 11HP and 13 torque gain with the honker on my otherwise stock '03 Z06 was still the same, I just messed up my addition. Sorry for the confusion. Again - 348 HP/ 334 torque stock, 359.3 HP/ 347.5 torque after the installation. The installation and dyno work was done by Jerry at Performance Garage in Smyrna, Tn. 5/24/05. 615-250-3966. Tell him Arte sent you.
He has since done a little header/exhaust, TB, and HP tuning to bring up the power to the current level in my signature. And just last week he installed tranny and engine oil coolers. The man does really nice work, not to mention corner weight alignments and tire mounting and balancing. His shop is full service complete with the dyno in house...