HKS Super Turbo Cat Back Exhaust Subaru WRX / STI 2015-2021

3 In stock
Exhaust Cat Back

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$1,520.00 $1,292.00

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Fitment Information:

2015-2021 Subaru WRX

2015-2021 Subaru STI


  • Improved throttle response with reduced turbo lag
  • Effective on stock to high performance vehicles w/ upgraded turbines.
  • The performance exhaust sound meets the JASMA standard.
  • Unique exhaust sound designed specifically for the engine.
  • Upgrades both the horsepower and sound of your vehicle
  • Made from premium quality materials
  • Ensures reliable operation for years to come


  • Material: 304 Stainless Steel
  • 3" to split 2.4" piping
  • Two 4.9" exhaust tips
  • 85dB vs stock 78dB (both are 60dB at idle)
  • Polished Tips

Not just powerful performance with quiet sound! HKS designed this cat back exhaust to result in a dry sporty exhaust sound that can be heard inside the vehicle at the step of a pedal. In pursuit of the ideal exhaust system, they used a 75mm straight structure which generates the lowest exhaust pressure while maintaining comfort inside the vehicle.

Note: Are you using a stock j pipe or downpipe? If yes, the GrimmSpeed Subaru Stock DP to Aftermarket 3 in. Catback Adapter p/n 077046, is required.
HKS Super Turbo Cat Back Exhaust Subaru WRX / STI 2015-2021
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