CXRacing 80mm Billet Throttle Body for RB20DET / RB25DET | TB-RB20-80

The CXRacing TB-RB20-80 is a CNC-machined billet aluminum throttle body for Nissan RB20DET and RB25DET setups using an intake manifold designed for a Q45-pattern throttle body. It combines an 80mm single-blade opening with a 3.5-inch inlet outside diameter and provisions for the factory RB20/RB25DET throttle position sensor. Ships fast across Canada and the US.

Specifications and Features

• Brand: CXRacing.
• Manufacturer part number: TB-RB20-80.
• Intended engines: RB20DET and RB25DET with a compatible intake manifold.
• Construction: CNC-machined billet aluminum housing.
• Throttle opening: 80mm internal diameter, single blade.
• Inlet outside diameter: 3.5 inches / approximately 89mm.
• Mounting pattern: Q45-style four-bolt, 78 × 78mm center-to-center.
• Sealed roller bearings.
• Accepts the factory RB20/RB25DET TPS sensor according to CXRacing.
• Throttle-cable adapter offers two installation orientations and multiple attachment points.
• Manufacturer lists a stock idle-control valve location.

Compatibility and Package Notes

Verify the manifold flange, throttle-cable travel, sensor mounting and connector, idle-control arrangement and inlet-pipe clearance before ordering. This RB-specific unit is not the separate CXRacing SR20DET throttle body. Q45-style refers to the manifold mounting pattern and does not establish direct replacement fitment for a Q45 vehicle.

This listing is for the throttle body with the described cable-adapter arrangement. A new TPS sensor, intake manifold, throttle cable, intake coupler, gasket and mounting fasteners are not promised as included. Confirm the current package contents before assembly.

Installation and Setup

Have an experienced installer match all interfaces and follow CXRacing's current setup instructions. Verify that the throttle opens fully and returns freely to the closed position without binding, and that the cable and return mechanism operate correctly before starting the engine.

Check sealing, TPS adjustment and idle operation after installation. Engine-management calibration may need review for the modified intake setup. No horsepower increase, airflow percentage or universal throttle-response improvement is guaranteed.

CXRacing markets this product for competition vehicles. No road-use or emissions approval is claimed.

Ships fast across Canada and the US.