GrimmSpeed Cat-Back Exhaust System Resonated

2011-2014 Subaru WRX Hatchback / 2008-2014 Subaru STI Hatchback

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SKU: 070045We price match!

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The Cat-Back Exhaust System will come in the resonated version to improve the power on the Subaru WRX/STI Hatchback.
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GrimmSpeed Resonated Cat-Back Exhaust System 2008-2014 Subaru WRX/STI Hatchback

Cat-Back Specs:

  • Custom Grimmspeed Muffler produces a deeper and more refined tone over OEM
  • Quad 3.5" double-wall angle-cut tips
  • Resonated option (quieter than the non-resonated version
  • 304 Stainless steel construction
  • 1/2" Thick flanges for perfect sealing and extreme durability
  • Flex section
  • Custom adjustable polyurethane hangers included for better ground clearance
  • TIG-welded
  • Includes GrimmSpeed license plate frame
  • Includes Grimspeed decal
  • Improved sound
  • Improved throttle response
  • Reduced turbo lag
  • Improved power and torque

GrimmSpeed Resonated Cat-Back Exhaust System

The GrimmSpeed Cat-Back Exhaust System is pure stainless steel art that combines a larger piping diameter along with smooth bends to create more horsepower, more torque, all while reducing the turbo lag. This design allows for an unobstructed exit path for the exhaust gases to escape while generating a more aggressive signature Subaru exhaust note. 

This exhaust system features quad polished tips and has a built-in resonator in the piping for those of you who want a more respectful noise level, and it can be employed on a full-blown race car, rally car, or daily-driven street car. Note that this particular exhaust has been made to fit the WRX/STI Hatchback models only. 


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  1. looks awesome

    By Jer November 20, 2022

    Quality exhaust with a throaty sound with no drone

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