BK Racing GM 4.3L Throttle Body Swap Adapter Kit for 2.2L & 2.4L Ecotec Manifolds

Increase the airflow potential of your Ecotec intake system with the BK Racing GM 4.3L throttle body swap adapter kit. This conversion kit is designed to mount a compatible, cable-operated GM 4.3L Vortec throttle body to supported 2.2L and 2.4L Ecotec intake manifolds.

Depending on part number and measurement method, the commonly used GM 4.3L throttle body has an opening of approximately 70–73mm. That larger opening can reduce restriction from the original throttle body and provide additional airflow capacity for modified naturally aspirated, supercharged, and turbocharged Ecotec engines.

This is an airflow-supporting modification—not a guaranteed horsepower upgrade. Results depend on the engine combination, intake manifold, tuning, and other supporting modifications.

Complete Throttle Body Conversion Kit

This version of the kit includes:

• CNC-machined aluminum Ecotec throttle body adapter plate

• Adapter mounting hardware

• Throttle-cable bracket

• Cavalier-to-GM 4.3L TPS adapter pigtail

• Wiring harness for the TPS conversion

Throttle body, throttle cable, gaskets, intake tubing, clamps, tuning, and application-specific hardware are not included unless expressly shown or selected with the product.

Features

• Adapts a compatible GM 4.3L Vortec throttle body to supported Ecotec intake manifolds

• Provides a larger throttle opening for performance-oriented intake systems

• CNC-machined aluminum construction

• Includes a throttle-cable bracket and TPS wiring components

• Avoids welding or permanently modifying the manifold flange

• Suitable for naturally aspirated, turbocharged, and supercharged custom builds

• Useful for Chevrolet Cavalier, Cobalt, HHR, Pontiac Sunfire and G5, Saturn Ion, and other Ecotec projects when equipped with a supported manifold

Ecotec Intake Manifold Compatibility

Designed for supported intake manifolds associated with these Ecotec engine families:

• 2.2L L61

• 2.2L LAP

• 2.4L LE5

• 2.4L LE9

• 2.4L LAT

Fitment is determined by the intake manifold and throttle-body configuration, not by vehicle model alone. Ecotec-equipped vehicles may use different manifolds, electronics, throttle controls, and clearance arrangements. Compare your parts with the product photos and verify compatibility before ordering.

Required Throttle Body

Use a compatible cable-operated GM 4.3L Vortec throttle body with the correct mounting pattern and separate throttle-position sensor.

Do not purchase a throttle body based only on its advertised model year or bore size. GM used multiple throttle-body designs, including incompatible electronic units. Verify the following before ordering:

• Cable-operated throttle linkage

• Mounting-bolt pattern

• Throttle-body flange shape

• TPS connector and pin arrangement

• Idle-air-control configuration

• Actual bore and outside dimensions

This kit is not advertised as a direct adapter for electronic drive-by-wire GM 4.3L throttle bodies.

4.3L V6 Fitment and Manifold Note

Casting and bolt-pattern differences may exist among 2.4L Ecotec intake manifolds. On some applications, one adapter hole—commonly the upper-left position—may not align with the manifold.

Do not assume that three-bolt mounting is automatically suitable for every manifold. Inspect the installation carefully and confirm that the adapter is evenly supported, properly sealed, and securely fastened before operating the engine.

Installation and Tuning

Professional installation is recommended. Depending on the vehicle and existing modifications, installation may also require:

• A suitable throttle cable

• Intake tubing or couplers

• A throttle-body or adapter gasket

• Idle-air-control wiring or plumbing

• Clearance adjustments

• ECU calibration

After installation, inspect for vacuum leaks, verify full throttle movement, confirm that the throttle returns freely to the closed position, and check TPS operation before driving.

ECU tuning may be required to achieve correct idle quality, throttle behavior, fueling, and drivability. Consult a qualified tuner familiar with your specific Ecotec control system.

Important Notice

This adapter changes the engine’s original intake and throttle-control configuration. Emissions legality varies by jurisdiction. Verify local requirements before installation.

Intended for off-road, racing, and custom-vehicle applications where permitted by law.

Engineered by BK Racing Inc. for builders seeking a practical GM 4.3L throttle body swap solution for compatible Ecotec intake manifolds.

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Adapt a compatible cable-operated GM 4.3L throttle body with this GM 4.3L throttle body swap adapter kit for select 2.2L and 2.4L Ecotec manifolds.

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