Hookdaddy, if you have a Gen 1 with stock pipes, leave your airbox alone. The Gen 1 Pair valve sits on a bracket bolted to the front of the motor behind the exhaust pipes. You will not gain any hp from removing it, or lose any from leaving it in place. If you decide to tear it off, you will need a set of four block off plates. If you decide not to remove it, you can disable it by doing the marble mod - plugging the line from the airbox to the Pair valve.