HKS 31029-AF005 Super Turbo Cat-Back Exhaust System with Center Pipe

The HKS 31029-AF005 Super Turbo Muffler is a premium cat-back exhaust system engineered specifically for turbocharged applications. Built with a straight-through muffler design, this system minimizes exhaust back pressure to support high-level tuning capability up to 500 horsepower. The complete kit includes the center pipe, making this a comprehensive exhaust upgrade.

Constructed from SUS304 stainless steel, the muffler section delivers long-lasting corrosion resistance and durability. The 75mm straight-through piping structure (stepped down to 60mm) is optimized to maximize exhaust flow and reduce pressure drop, translating directly into improved boost response and a broader powerband. The system features dual 124mm SSR-style exhaust tips for an aggressive, track-inspired appearance.

HKS engineering reduces exhaust resonance and interior noise under street driving conditions compared to competing performance exhausts, making it equally suitable for daily driving and performance use. Ground clearance matches the stock exhaust, making this system compatible with lowered vehicles. The system can also be paired with the HKS Metal Catalyzer for further performance gains.

Key Features:

• Straight-through muffler design for maximum exhaust flow and minimal back pressure
• Material: SUS304 stainless steel construction
• Piping: 75mm to 60mm x 2mm wall thickness
• Tip Size: 124mm diameter, Left & Right (SSR style)
• Sound Level (Close): 90 dB
• Sound Level (Idle): 66 dB
• Supports tuning up to 500 horsepower
• Maintains stock ground clearance — ideal for lowered vehicles
• Compatible with HKS Metal Catalyzer for additional power gains
• Center pipe included — complete 2-piece exhaust package
• Made in Japan

Package includes the complete exhaust system, center pipe, necessary hardware, installation instructions, warranty information, and HKS decals.