HKS Hi-Power 409 ER34 4dr RB25DET

HKS is a well-known name in the performance automotive world, especially for their focus on turbocharged Japanese vehicles. This Hi-Power 409 cat-back exhaust system is built specifically for the ER34 Skyline with the RB25DET engine in the 4-door configuration. If you're looking to improve the sound and flow of your RB25DET's exhaust system, this is a solid option to consider.

This cat-back system replaces the factory exhaust from the catalytic converter back to the rear of the vehicle. It's constructed from SUS304 stainless steel, which is strong and resists corrosion, helping it last longer in various conditions. The muffler design is a straight-through type, which helps reduce backpressure and allows the RB25DET engine to breathe more freely. This often results in a deeper, more aggressive exhaust note compared to the stock system, and can also contribute to improved throttle response. The piping diameter is 75mm, which is a common size for performance applications on this engine, balancing flow with maintaining good low-end torque characteristics. The system includes the main piping, muffler, and necessary hangers and clamps for installation.

When installing a cat-back exhaust, it's always a good idea to check the condition of your existing hangers and any exhaust gaskets that connect to the catalytic converter. While this system is designed to fit directly, ensuring all mounting points are in good shape will make the installation smoother and help prevent leaks. Refer to the manufacturer's installation instructions for specific details regarding mounting and any required hardware beyond what's included.