Description

*SPEC-L II weight: 10.0kg (60% less than the original muffler)

The HKS Hi-Power 409 represents an intelligently engineered performance exhaust solution that balances cost-effectiveness with authentic HKS quality, specifically designed for the Honda S2000 AP2 chassis.

Utilizing S409 stainless steel construction rather than the premium S304 material found in higher-tier offerings, this system delivers meaningful performance enhancement and refined acoustic improvement while maintaining an accessible price point.

With measured sound levels of L94/R93 dB—actually slightly quieter than the factory system’s 95 dB—and practical 135mm ground clearance, the Hi-Power 409 provides a compelling entry point into HKS’s exhaust technology while preserving the driving refinement and real-world usability that define the S2000 experience.

Product Highlights

💰 Strategic Material Selection for Value Optimization
Employing S409 stainless steel rather than the premium S304 material used in higher-priced HKS exhausts, the Hi-Power 409 achieves significant cost reduction while maintaining proper corrosion resistance and structural integrity for long-term performance.

This material strategy represents intelligent engineering prioritization—allocating resources where they provide maximum benefit while making calculated compromises that reduce cost without sacrificing core functionality or driving experience.

🔊 Refined Acoustic Enhancement with Actual Noise Reduction
Demonstrating sophisticated exhaust tuning, the Hi-Power 409 produces measured sound levels of 93-94 dB during proximity testing—slightly quieter than the factory system’s 95 dB measurement. This achievement of actual decibel reduction alongside performance potential challenges conventional assumptions about aftermarket exhausts, providing a more purposeful exhaust note during spirited driving while maintaining excellent street manners and potentially improving track-day noise compliance.

🎯 Authentic HKS Engineering at an Accessible Price Point
While utilizing cost-optimized materials, the Hi-Power 409 retains the essential engineering principles that define HKS’s exhaust technology—including the optimized Y-pipe bifurcation design, dual 60-50mm intermediate piping for balanced flow characteristics, and precision mandrel bending for optimal exhaust gas velocity. This approach delivers authentic performance enhancement while expanding accessibility to enthusiasts with budget considerations.

📐 Practical Design for Real-World Application
With 135mm of ground clearance at the exhaust system’s lowest point (measured on standard suspension), this design maintains excellent usability for daily driving and spirited use. The practical clearance specification accommodates common road conditions while providing flexibility for mild suspension modifications, ensuring the performance benefits remain accessible rather than requiring perfectionist driving conditions.

Technical Specifications

Product Name: Hi-Power 409

Model Code: 32003-AH007

Certification Number: 03S07566

Vehicle Compatibility: Honda S2000 AP2 (2005-2009, F22C engine)

Construction & Materials:

• Primary Material: S409 stainless steel (cost-optimized alternative to S304)

• Muffler Configuration: Hi-Power 409 design with value-focused engineering

• Tailpipe Diameter: 94mm left and right

• Intermediate Piping: Dual 60-50mm configuration (widest flow sections)

• Application Area: Y-pipe bifurcation and complete cat-back system

Performance & Dimensions:

• Proximity Exhaust Sound: HKS: L94/R93 dB | Factory: 95 dB

• Ground Clearance: 135mm at lowest exhaust point (standard suspension reference)

Installation & Fitment Notes:

• Mounting Components: Hooks, brackets, and stays subject to revision as part of continuous product improvement

• Suspension Compatibility: Primary data from standard suspension with some validation on lowering configurations

• Clearance Consideration: Minimum ground clearance measured specifically at exhaust components, potentially differing from overall vehicle clearance

Performance & Engineering Philosophy

Goal: To deliver authentic HKS performance enhancement and driving experience improvement at an accessible price point through strategic material selection and focused engineering—making quality exhaust technology available to a broader range of S2000 enthusiasts without compromising core performance benefits or refinement characteristics.

Focus: Value optimization through calculated material selection; refined acoustic tuning achieving actual noise reduction; practical design for real-world usability; and retention of essential HKS engineering principles that define performance exhaust functionality rather than pursuing cost reduction at the expense of driving experience.

Installation & Application Considerations

🔧 Professional Installation Recommended
While designed for direct replacement installation, professional fitting ensures optimal alignment, proper sealing at connection points, and correct mounting to prevent stress on exhaust hangers. The Y-pipe bifurcation design requires particular attention to ensure symmetrical flow distribution between left and right exhaust paths.

⚠️ Critical Fitment & Usage Notes:

• Material Characteristics: S409 stainless steel offers good corrosion resistance for most environments but may not match the longevity of premium S304 in extreme conditions or coastal applications

• Sound Character Differences: While decibel measurements show slight reduction, the exhaust note quality and character differ meaningfully from factory—providing enhanced aural feedback without increased volume

• Value Proposition Context: The Hi-Power 409 represents a strategic balance between cost and capability, making authentic HKS engineering accessible rather than offering maximum material specification

• Long-Term Maintenance: Like all performance exhausts, periodic inspection of mounting points and connections ensures continued optimal performance

🎯 Primary Performance & Experience Benefits:

• Accessible Enhancement: Authentic HKS performance technology at a price point that expands accessibility to budget-conscious enthusiasts

• Acoustic Refinement: Purposeful exhaust note improvement with actual decibel reduction compared to factory—enhancing driving engagement without compromising civility

• Flow Optimization: Engineered Y-pipe design and dual 60-50mm piping maintain proper exhaust velocity for potential performance gains

• Practical Usability: Excellent ground clearance and refined sound characteristics suit diverse driving applications from daily use to spirited backroad enjoyment

Strategic Advantages & Market Positioning

📊 Intelligent Tiered Product Strategy
The Hi-Power 409 represents a deliberate positioning within HKS’s exhaust hierarchy—offering core engineering benefits at an accessible price point while higher-tier products provide premium materials and additional refinement for enthusiasts with different priorities and budgets.

🔩 Focused Engineering Resource Allocation
By maintaining essential performance engineering while optimizing material costs, HKS demonstrates understanding of enthusiast priorities—where driving experience and quality engineering often matter more than maximum material specification for many practical applications.

🚗 Expanding the HKS Community
This value-focused offering serves as an entry point to HKS’s technology ecosystem, allowing more S2000 owners to experience authentic performance enhancement while potentially fostering brand loyalty that may lead to additional upgrades over time.