HKS Hi-Power Muffler Exhaust

2017–2025 Honda Civic Si Sedan 1.5L Turbo

Part #: 31006-BH002

Overview

The HKS Hi-Power Muffler Exhaust System for the Honda Civic Si Sedan is a high-performance upgrade designed to enhance both the sound and efficiency of your vehicle. Crafted with precision and attention to detail, this cat-back exhaust system offers a perfect balance of style, durability, and performance. Whether you're a daily driver seeking a more aggressive tone or a spirited enthusiast aiming for increased power, this exhaust system is engineered to meet your needs.

Built for the 10th generation Honda Civic Si Sedan models from 2017 onward, this system is ideal for those looking to improve exhaust flow, support modest power gains, and enjoy a more engaging exhaust note. The Hi-Power exhaust from HKS is a popular choice among enthusiasts who want a reliable, high-quality upgrade that complements the sporty character of their Civic Si.

Key Features

The HKS Hi-Power Muffler Exhaust System incorporates several advanced features that set it apart from the stock setup:

• Constructed from SUS304 stainless steel, ensuring excellent corrosion resistance and long-lasting durability in various driving conditions.
• Piping diameter of 65mm (2.56 inches) optimizes exhaust flow, reducing backpressure and supporting improved engine breathing.
• Features a 97mm (3.82 inches) tip diameter, providing a bold, aggressive appearance and enhanced exhaust note.
• Designed with a signature HKS Hi-Power tone, delivering a deeper, sportier sound that elevates your driving experience.
• Mandrel-bent tubing ensures smooth airflow with minimal turbulence, maximizing performance benefits.
• Easy bolt-on installation with factory mounting points, requiring no cutting or welding.
• Enhances the sporty aesthetics of your Civic Si with a sleek, polished finish.
• Supports increased exhaust flow for potential power and torque improvements over stock systems.

Construction & Design

The HKS Hi-Power exhaust system is meticulously engineered using high-quality SUS304 stainless steel, which provides excellent resistance to rust and corrosion, ensuring longevity even in harsh environments. The mandrel-bent tubing maintains a consistent diameter throughout, promoting optimal exhaust flow and reducing turbulence. The system's design emphasizes a lightweight yet durable construction, contributing to improved vehicle responsiveness.

The polished stainless steel tip not only adds a refined aesthetic but also enhances the exhaust note, giving your Civic Si a more aggressive and sporty sound profile. The system's seamless fitment and straightforward bolt-on installation make it a popular choice for enthusiasts seeking a hassle-free upgrade that delivers both style and performance.

Installation & Fitment

The HKS Hi-Power exhaust system is a direct bolt-on replacement for the factory exhaust on 2017 and newer Honda Civic Si Sedan models. No cutting, drilling, or welding is required, and all necessary hardware and instructions are included for a straightforward installation process. The system mounts to existing factory points, ensuring a secure fit and reliable performance.

What's Included

• Complete exhaust system with front pipe, mid-pipe, and muffler
• Polished stainless steel exhaust tip
• All necessary clamps and hardware
• Installation instructions

Ideal For

• Honda Civic Si Sedan owners seeking a performance upgrade
• Enthusiasts wanting a sportier exhaust tone
• Drivers looking to support increased exhaust flow and potential power gains
• Anyone wanting a durable, high-quality stainless steel exhaust system