105mm Throttle Body - 1520CFM 4.250 OD

The Wilson Manifolds 105mm Throttle Body – 1520 CFM 4.250 OD (Part No. 471105D) is a single-blade aluminum throttle body engineered for high-flow fuel-injection applications. This universal component delivers the airflow capacity necessary for naturally aspirated and supercharged engines operating across a wide range of displacement and induction configurations. The 105mm bore diameter and 1520 cubic feet per minute flow rating make this throttle body suitable for engines requiring precise fuel metering without flow restriction.

Constructed from durable aluminum in a natural finish, the throttle body features a 4.250-inch outer diameter flange that integrates with standard multi-port fuel injection systems. The single-blade design provides consistent throttle response and simplified tuning compared to more complex butterfly configurations. At 2.4 pounds, the compact form factor (7.6 × 7.45 × 7.7 inches) facilitates installation in space-constrained engine bays while maintaining full flow capacity. The throttle body's universal mounting pattern allows fitment across diverse engine platforms and manifold designs used in street, race, and performance applications.

This throttle body is specified for builders and tuners working with custom fuel-injection setups where stock intake restriction limits peak horsepower. The 1520 CFM capacity supports engines in the 400–550 naturally aspirated horsepower range and functions effectively in forced-induction applications where boost levels demand unrestricted airflow. Technicians integrating this component with aftermarket fuel injection, carburetor conversion kits, or engine swaps benefit from its neutral aluminum construction, which resists corrosion and integrates seamlessly with both mechanical and electronic throttle actuation systems.