HKS 32018-AS004 Legamax Premium Cat-Back Exhaust System Main Pipe

The HKS Legamax Premium Exhaust System (32018-AS004) is an engineered performance exhaust solution designed to reduce backpressure and optimize exhaust flow for measurable gains in peak power and a broader, more usable torque band. This listing covers the main pipe section only.

HKS engineers each Legamax application with a model-specific muffler design, geometry, and piping diameter carefully selected to preserve strong low-end torque while unlocking maximum high-end horsepower. The result is a performance exhaust that improves the entire powerband rather than sacrificing low-RPM response for top-end gains.

Key Features:

• Constructed from polished SUS304 stainless steel piping for superior corrosion resistance and longevity
• Reduces exhaust backpressure for improved engine breathing and efficiency
• Application-specific muffler design and piping diameter tuned for balanced performance across the RPM range
• Delivers increased peak horsepower while maintaining low-end torque
• Premium polished finish for a clean, factory-plus appearance
• Main pipe section — intended for use as part of a complete Legamax system

The HKS Legamax line represents HKS's commitment to delivering race-proven exhaust technology in a street-friendly package, combining aggressive performance tuning with the build quality and finish expected from one of Japan's most respected performance brands.