Modifying the factory exhaust manifold can bring several benefits, including:

1. Increased engine power output: The factory exhaust manifold is designed to reduce noise and emissions, which creates some restrictions on exhaust flow and increases exhaust resistance. By replacing the factory exhaust manifold with a modified one that has a more efficient design and better materials, the engine's exhaust flow becomes smoother, resulting in increased engine power and torque.

2. Improved fuel economy: A modified exhaust manifold can increase engine efficiency, leading to improved combustion efficiency and better fuel economy.

3. Enhanced engine sound: A modified exhaust manifold can make the engine sound louder and more aggressive, enhancing the driving experience.

4. Long-lasting engine life: A modified exhaust manifold can decrease back pressure in the exhaust system, reducing the engine temperature and heat loss. This helps prolong the engine's life expectancy.

We have many exhaust manifold for Honda,Audi,BMW,Porsche,Lamborghini,Toyota and so on.

Here I attached some pictures for reference.

Audi R8 V10 exhaust manifold

Honda K series turbo manifold

Honda K series exhaust swap header.

By the way, we provide customized service based on sample or 3D drawing.

If you have any needs or questions, welcome to email to cece@cnjagrow.com.