Correct, the Tomei/Cusco racecar was an 06-07 model, which has Single AVCS.So& the TOMEI/Cusco Time Attack car only had AVCS on the intake. Thought they used an STI as the basis for that car. Wouldn't it have Dual AVCS (intake & exhaust)? Sorry if another noobish question. Always learning.
you can read up on that car here: Tomei Powered/CUSCO/Voltex Subaru Impreza WRX STi - Time Attack - Turbo & High-Tech Performance Magazine