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Invidia Gemini/R400 Single Layer Quad Black Tip Cat-Back Exhaust – 2015-2021 WRX / STI

Invidia Gemini/R400 Single Layer Quad Black Tip Cat-Back Exhaust – 2015-2021 WRX / STI


Designed and manufactured for the hardcore enthusiasts. Inspired and designed for the track ready Subaru WRX/STI VA.


In stock


SKU: HS15STIGM4SB Categories: , , , , , , Tag:


Invidia’s most popular exhaust system

Specifically designed to fill the sound gap between the Q300 and N1 system, the R400 produces a unique, agressive note while minimising harsh cabin noise (particularly at highway speeds). The R400 muffler was designed using years of experience from Invidia’s engineers to allow the perfect balance between unrestricted exhaust gas flow and sound dampening. This exhaust system will provides a pronounced exhaust note throughout the entire RPM band even when only installed as a cat-back system. The R400 muffler design also looks great with a race inspired design that will turn heads.

The Invidia R400 Exhaust takes quality, performance and looks to a new level.

From start to finish the Invidia Exhaust Systems are designed with performance in mind with the exhaust route carefully selected to ensure minimal bends, allowing for an unobstructed exit of exhaust gases with minimal restrictions and turbulence. This will allow for improvements in both horsepower and torque, along with improvements in throttle response with a reduction in turbo lag for turbocharged vehicles. Additionally, you get the reward of an aggressive exhaust note.


  • 304 Stainless Steel
  • Black Tips
  • Full 3″ Piping
  • Minimal Bends = Improved Horsepower and Torque
  • Cast Flanges = Correct Fitment and No Leaks
  • New Hardware and Gaskets Included


Additional Information

Weight 63 lbs
Dimensions 60.6 × 18 × 14.8 in


  • 2015-2021 WRX/STI