Hey Christopher....
From:
http://www.accufabracing.com/
"After much research and development, we have created our first throttle body specifically for the Chevrolet Camaro. These cars are hot and hot cars deserve a great throttle body! Your LS1 Camaro will benefit greatly from our newest addition, a 75mm throttle body, available for only $399.99. Although the stock and Accufab throttle body are the same size, 75mm, Accufab flows 922 cfm compared to stock which flows 798 cfm. Dyno test results, with an Accufab throttle body on a stock vehicle, have shown a 6 to 9 horsepower increase"
Damn...still the stock bore....
You ain't owned shit.