Honda Civic Type R (2023-) FL5 Eventuri Carbon Intake

Honda Civic Type R (2023-) FL5 Eventuri Carbon Intake

The Honda Civic Type R FL5 Eventuri Carbon Intake optimizes engine performance by minimizing heat soak and ensuring a constant flow of cold air to the turbo. The sealed airbox and placement behind the radiator ensure that heated air is not drawn into the intake, providing an optimized solution for the FL5 engine.

We have also replaced the OEM flexible intake hose, which creates turbulence and therefore increases drag. With the FL5 Intake, we’ve engineered a seamless path from the filter to the inlet tube, eliminating drag and smoothing the airflow. Engine movement is now catered for by the inlet tube itself, which can move within the airbox whilst maintaining a seal against heat.

Our carbon airbox has been designed to maximise the use of the available volume and minimised heat ingress. The resulting performance gains and aesthetics are industry leading for the FL5 Type R.

The Eventuri FL5 Type R intake system consists of a number of components engineered to perform a specific purpose and fabricated to the highest of standards. Here are the details for each component and the design ethos behind them:

Each intake system consists of:

• Prepreg Carbon Fibre Airbox Enclosure
• Custom High Flow Air Filter ISO Tested
• Carbon Venturi stack with integrated MAF tube
• Full Silicon Joiner with Breather Inlets
• Laser Cut Bracket Work

Carbon Airbox Enclosure



The FL5 airbox has been designed to make the most effective use of the volume in the engine bay. It shields the filter from the multiple sources of heat, the most direct being the radiator and fan which pushes a stream of hot air directly into the intake area. The other significant heat sources are the turbo and downpipe which sit next to the intake area and once the engine is up to operating temperatures, the engine bay becomes quickly heat soaked. All these heat sources require a complete airbox system as shielding in order to maintain low intake air temperatures.

Carbon Venturi Tube



To connect our cone filter to the stock turbo pipe, we designed a tube with an integrated MAF sensor mount and an Venturi stack matched to the inner diameter of the filter neck. This curvature allows the airflow to remain laminar as it goes through the filter and enters the tubing. This replaces the stock flexible rubber tube which has several deep ridges and creates turbulence in the flow path. To maintain a degree of flexibility - the tube is independent of the airbox enclosure and is able to move within the airbox, which relieves any stresses from the engine movements. The Eventuri tube design results in an aerodynamically efficient flow path from the filter to the turbo allowing the turbo to generate boost more effectively and reduce lag.



Custom Silicon Hose



The final component is our silicon hose which replaces the OEM hose and breather assembly all the way to the alloy turbo tube. The hose removes all the interfaces between the carbon intake and the metal turbo tube. Furthermore we have incorporated an internal step which mates to the OEM metal tube. This eliminates the exposed edge of the metal tube which is exposed with other aftermarket silicon hoses. This silicon hose is the final part of the intake and allows for smooth airflow from the intake to the turbo tube.