ACES EFI 4-barrel throttle body is designed to fit on any square bore (4150 style) intake manifold. It has four 1-3/4”throttle plates. They also make affordably priced replacements for similar throttle bodies. These units include four 1.75 in. throttle bores for a 1,000 cfm flow rating. These throttle bodies are diecast and fully machined with high-quality components including the Throttle Position Sensor (TPS), MAP sensor and Idle Air Control (IAC) motor.