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...with its optional 90mm polished, billet-aluminum, high-flow throttle-body. When complemented with the FAST intake and MTI's own 90mm mass airflow sensor, this combination flows well over 1,000 cfm and adds 25-30 hp, according to MTI. An LS1 Speed high-flow induction system helps get the air in, and delivering the fuel is the stock pump at 43 psi and the stock rails. But the 28-lb/hr injectors have been swapped for Bosch 30-lb/hr units. MSD wires augment the stock ignition system, and 13/4-inch primary diameter Stainless Works long-tube headers evacuate the exhaust through a pair of 3-inch high-flow cats and a dual after-cat system. Throw on the optional underdrive crank pulley and those beautiful custom MTI 455 H.O. rocker covers, and this GTO is ready for action.