Greddy R33 RB25DET Intake Manifold

The GReddy R33 RB25DET intake manifold is a performance upgrade designed for the Nissan Skyline R33 with the RB25DET engine.
It’s a cast aluminum intake plenum that replaces the factory unit, aiming to improve airflow and distribution to the cylinders, ultimately leading to increased horsepower, torque, and throttle response.
This manifold is particularly beneficial for highly tuned engines and those running larger turbochargers at higher boost levels.

Here’s a more detailed breakdown:
Improved Airflow:
The GReddy intake manifold is designed to flow more air than the stock unit, allowing for greater potential gains in power and performance.

Even Air Distribution:
The cast aluminum construction ensures that air is distributed evenly to each cylinder, which is crucial for optimal combustion and performance.

Throttle Body Compatibility:
The GReddy manifold is designed to accommodate a larger Q45 throttle body or an equivalent, further enhancing airflow.

Performance Focus:
It is particularly well-suited for engines with significant modifications, such as larger turbos and higher boost levels.

Relocated Throttle Body:
Some versions of the GReddy manifold relocate the throttle body, which can improve intercooler and charge air pipe routing.

Installation Considerations:
While it’s a direct bolt-on for the RB25DET engine, some minor modifications may be required for proper installation.