Bosch 74mm Electronic Throttle Body – Includes connector and pins Diameter: 74mm

Balanced Performance: Bosch 74mm Electronic Throttle Body

The Bosch 74mm Electronic Throttle Body strikes an ideal balance between high flow capacity and precise low-speed modulation. While 82mm units are favored for drag racing monsters, the 74mm bore is often the perfect sweet spot for high-performance street cars, time attack builds, and engines in the 500-800hp range (depending on displacement). It offers a significant upgrade over standard 60mm units without sacrificing the resolution required for smooth low-RPM drivability. Engineered by Bosch, this DBW unit eliminates the mechanical cable, allowing the ECU to decouple the throttle plate from the pedal for advanced torque management strategies, such as traction control intervention and launch RPM holding.

Precision Engineering

Internal to the housing is a robust DC motor and a gear drive system designed to withstand millions of actuation cycles. The unit features dual potentiometer redundancy, providing two inverse voltage signals to the ECU for continuous error checking. This ensures that if a sensor fault occurs, the system can safely default to a limp mode rather than sticking open. The 74mm size is particularly popular for boosted 4-cylinder (K-Series, SR20, 4G63) and 6-cylinder (RB, JZ, Barra) applications where response is as critical as peak power. The kit comes complete with the specific electrical connector, ensuring you have everything needed to integrate it into your custom harness.

Technical Specifications