Velocity Race Intake Manifold with Fuel Rail and Throttle Body Gasket for Honda D-Series

An aftermarket custom intake manifold is a performance upgrade designed to replace the factory-installed intake manifold in a vehicle. The intake manifold is responsible for directing air into the engine's combustion chambers, and aftermarket versions can improve airflow, increase horsepower, and provide better engine performance.

Benefits of an Aftermarket Custom Intake Manifold:

1. Increased Airflow: Aftermarket manifolds are designed to improve the flow of air to the engine, reducing restrictions and helping the engine breathe more efficiently.

2. Higher Horsepower: By optimizing airflow, the engine can achieve better combustion, which translates to more power, especially when paired with other performance upgrades (like a cold air intake or exhaust system).

3. Better Throttle Response: With smoother airflow, the engine can respond more quickly to throttle input, resulting in a more responsive driving experience.

4. Customizability: Aftermarket intake manifolds often come with options for porting or custom designs that cater to specific engine needs (e.g., high-revving applications, forced induction setups like turbocharging or supercharging).

5. Improved Tuning Potential: A custom intake manifold can offer more opportunities for tuning, allowing the vehicle's engine management system (ECU) to be optimized for better performance.

Considerations When Choosing an Aftermarket Intake Manifold:

1. Material: Intake manifolds come in  material aluminum. Aluminum is common for performance builds due to its lightweight and heat-dissipating properties.

2. Size and Fitment: Make sure the manifold is compatible with your engine and that it fits without requiring excessive modification.

3. Intended Use: For street applications, a manifold designed for mid-range torque may be ideal, whereas a racing or high-performance setup might focus more on high RPMs and airflow at the top end.

4. Installation: Some manifolds require significant work, such as porting the heads or modifying the fuel system, so it’s important to consider the complexity of installation.