Twin 58mm Throttle Body - 94-97 LT1

The BBK Performance Twin 58mm Throttle Body for 1994-97 LT1 engines is a dual-blade intake manifold upgrade engineered to increase airflow and throttle response on Gen II small-block Chevrolet platforms. This aluminum throttle body replaces the restrictive OEM single-blade design with a twin-58mm configuration, delivering measurable gains in volumetric efficiency and engine responsiveness across the RPM range. Purpose-built for naturally aspirated LT1 applications, this component is essential for builders seeking to maximize intake velocity and transient throttle response.

Each 58mm bore provides optimized flow characteristics for the LT1's displacement and intake port geometry. The dual-blade design eliminates the velocity loss inherent in single-throat designs, allowing the engine to breathe more efficiently during acceleration and sustained load conditions. Constructed from aluminum with a natural finish, the throttle body mounts to the factory flange interface, ensuring direct bolt-on compatibility without custom fabrication. The Power Plus designation reflects BBK's performance-tuned internal geometry, which has been validated on dynamometer testing to produce consistent power improvements when paired with complementary induction and fuel management upgrades.

This throttle body is designed for owners of 1994–1997 LT1-equipped vehicles—Camaros, Firebirds, Corvettes, and Impala SS models—who are building naturally aspirated combinations and require intake manifold improvements beyond the baseline specification. Installation requires basic mechanical skill and works with factory intake manifolds and ECU tuning. The 58mm twin-blade configuration is most effective in combination with a matched fuel system upgrade and proper ECU calibration to realize full performance potential. Weighing just 4 lbs, the throttle body adds minimal mass while delivering repeatably measurable intake efficiency gains on dyno and road testing.