The Invidia Gemini R400 Cat-Back Exhaust is built for 86, BRZ, and FR-S owners who want a deeper, more aggressive exhaust note without going as raw as the N1. Made from T304 stainless steel, the R400 is designed to improve exhaust flow, reduce restriction, and give the car a more pronounced tone throughout the RPM range.

Positioned between the quieter Q300 and the louder N1, the R400 offers a great balance of sound, performance, and daily drivability. The system uses 70mm mandrel-bent piping, CNC-machined flanges, robotic welds, and your choice of Titanium or Stainless Steel tips for a clean, performance-focused finish.

Key Features

• Aggressive R400 Sound: Designed to fill the gap between the quieter Q300 and louder N1 exhaust systems.
• 70mm Piping Diameter: 2.75" piping helps improve exhaust flow and reduce restriction.
• T304 Stainless Steel Construction: Durable stainless construction helps reduce the risk of cracks, breaks, rasp, and vibration.
• 1.5mm Thick Mandrel-Bent Piping: Smooth bends help maintain consistent exhaust flow with minimal turbulence.
• 101mm Exhaust Tips: Large 4.3" tips give the rear of the car a more aggressive look.
• Titanium or Stainless Steel Tip Options: Choose the finish that best matches your build.
• CNC-Machined Flanges: Precision fitment and long-term durability.
• Robotic Welds: Consistent weld quality for strength and clean appearance.
• Balanced Street Performance: Designed for a rich, deep tone while minimizing harsh cabin noise.

Why We Like It

The R400 is one of the best middle-ground exhausts for the first-gen 86/BRZ chassis. It is more exciting than the Q300 but more livable than the N1, making it a strong choice for street cars that still see spirited driving. You get the tone and rear-end presence most owners want without turning every highway drive into a drone session.

Sound & Performance

Invidia designed the R400 muffler system to balance unrestricted exhaust flow with sound control. The result is a rich, deep, aggressive exhaust note that enhances the natural tone of the FA20 engine while keeping harshness and excessive volume in check, especially during highway driving.

Available Tip Options

• Titanium Tips
• Stainless Steel Tips

Specifications

• Product: Gemini R400 Cat-Back Exhaust
• Material: T304 stainless steel
• Piping Thickness: 1.5mm
• Piping Diameter: 70mm / 2.75"
• Tip Diameter: 101mm / 4.3"
• Tip Options: Titanium or stainless steel
• Bends: Mandrel bent
• Flanges: CNC machined
• Welding: Robotic welded

Installation Notes

• Designed as a cat-back exhaust system for compatible first-generation 86/BRZ chassis applications.
• Professional installation is recommended.
• Inspect exhaust gaskets and hardware during installation and replace as needed.
• Adjust exhaust alignment and tip position before final tightening.
• Re-check all exhaust hardware after the first heat cycle.

Compatibility & Disclaimers

Designed for compatible 2013–2021 Subaru BRZ, 2013–2021 Toyota 86 / GT86, and 2013–2016 Scion FR-S applications. Exhaust sound, fitment, and performance results may vary depending on headers, over pipe, front pipe, tuning, and other supporting modifications. Always verify local noise and emissions regulations before installation.