HKS 31006-AT008 Hi-Power 409 Cat-Back Exhaust for 1990-1999 Toyota MR2 SW20 3S-G

Vehicle Fitment

• 1990-1999 Toyota MR2 (SW20), 2.0L 3S-GTE turbocharged I4

Features

• HKS Hi-Power 409 cat-back exhaust engineered for performance and flow
• Straight-through muffler design reduces back pressure and improves exhaust velocity
• Large 120 mm single rear exit tip for aggressive styling
• 75 mm main piping diameter designed for increased horsepower potential
• Durable stainless steel construction for corrosion resistance and strength
• Sporty exhaust note with enhanced mid-range and high-RPM tone
• Direct bolt-on replacement for stock exhaust components
• Improved throttle response and exhaust efficiency on tuned engines

Specifications

• Part Number: 31006-AT008
• Series: Hi-Power 409 cat-back exhaust
• Exhaust Type: Cat-back performance exhaust system
• Material: SUS304 stainless steel muffler and tip, SUH409 piping
• Main Pipe Diameter: ~75 mm
• Tip Diameter: ~120 mm
• Exit Style: Single rear
• Fitment Years: 1990-1999 Toyota MR2 SW20 turbo

Included Components

• 1x Hi-Power 409 cat-back exhaust assembly
• Exhaust mounting hardware and gaskets

Product Description

The HKS 31006-AT008 Hi-Power 409 Cat-Back Exhaust System is a performance-oriented upgrade designed specifically for the Toyota MR2 SW20 equipped with the 2.0L 3S-GTE turbocharged engine from 1990 through 1999. This cat-back system enhances exhaust flow, reduces back pressure, and helps improve throttle response and power delivery throughout the RPM range. Its straight-through muffler path and large single rear tip give the MR2 a sportier, more aggressive exhaust note while retaining usability for daily driving.

Built with a combination of SUS304 stainless steel for the muffler and tip and SUH409 piping for the hidden sections, the Hi-Power 409 exhaust offers durability and resistance to corrosion while keeping costs balanced. The direct-bolt-on fitment makes installation straightforward without modifying stock mounting points. This exhaust is ideal for enthusiasts seeking a blend of performance gains, distinctive sound, and quality construction on their SW20 MR2 turbo builds.