Edelbrock Part # 3713 Performer 4.3L T.B.I V6 intake manifold is designed for street 1987-94 Chevrolet 4.3L V6 with factory Throttle Body Injection. The Performer 4.3L intake manifold provides outstanding throttle response and torque increases from idle to 5500 rpm. Accepts all factory accessories/hardware. Throttle body unit remains in stock location. Not for 1994 and later engines equipped with flash memory computer. Flash memory ECM is located underhood. A computer chip is available at no charge. Return postage paid card comes with the manifold to receive the chip.