HKS 32003-DH001 Hi-Power Cat-Back Exhaust System - 409

The HKS 32003-DH001 Hi-Power 409 is a high-performance cat-back exhaust system designed with race-inspired engineering from Japanese endurance and GT racing. This exhaust system features an innovative offset muffler and optimized piping design that maximizes exhaust flow for improved engine efficiency and power gains, particularly at higher RPMs.

Key Features:

• Race-inspired offset muffler design eliminates unnecessary bends for the straightest exhaust path
• Rear section constructed from premium SUS304 stainless steel for superior corrosion resistance and high-luster finish
• Piping section made from coated SUH 409 stainless steel offering enhanced thermal expansion resistance and improved acoustic properties
• Variable diameter piping: 50mm between catalytic converter and first silencer, expanding to 60mm after silencer to exit
• 120mm polished tip diameter for aggressive styling
• Straight-through muffler design with superior sound absorption properties
• Complete bolt-on installation with all gaskets, mounting bolts, and hardware included

The Hi-Power 409 series combines performance-oriented design with cost-effective materials, using SUH 409 steel for hidden sections to reduce cost while maintaining the premium SUS304 stainless steel where visible. This material combination also provides better acoustic dampening compared to all-SUS304 systems, allowing for an aggressive exhaust note without excessive drone. The system delivers improved exhaust velocity and flow capacity, making it ideal for both stock and modified applications.