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  • HKS 15-21 WRX/STI Hi-Power Catback Exhaust | 31006-BF001
  • HKS 15-21 WRX/STI Hi-Power Catback Exhaust | 31006-BF001
  • HKS 15-21 WRX/STI Hi-Power Catback Exhaust | 31006-BF001
  • HKS 15-21 WRX/STI Hi-Power Catback Exhaust | 31006-BF001

HKS

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Hi-Power Cat-Back Exhaust

Fits: 15-21 WRX/STI

$1,90000
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50 in stock
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Auto Parts Store of the Year 2026

HKS Hi-Power Cat-Back Exhaust
Fits: 15-21 WRX/STI
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Fitment

Please Note: Legacy custom.fitment_info contained invalid labels ('2015-2021 Subaru | WRX', '2015-2021 Subaru | WRX STI' - not in the valid bucket list); replaced with the four valid split buckets above. Not on sale ($1900.00 = compare-at) - no On Sale tag.
  • 2015–2021 Subaru | WRX STI
  • 2015–2021 Subaru | WRX

Description

The HKS Hi-Power Cat-Back Exhaust System for the 2015-2021 Subaru WRX and WRX STI (VA chassis) is a free-flowing system tuned for the boxer sound. A built-in resonance pipe eliminates low exhaust resonance while letting owners enjoy the deep boxer rumble. SUS304 stainless steel piping runs 74.7mm stepping down to dual 60.5mm (approx. 2.9 in to dual 2.4 in), ending in dual 97mm burnt titanium tips. At 33 lbs vs approx. 46 lbs stock, it shaves significant weight while delivering an aggressive 90 dB tone. It includes the mid/center pipe and bolts directly to the OEM downpipe with the supplied gaskets and hardware.

  • Fits 2015-2021 Subaru WRX (VAG) and WRX STI (VAB)
  • SUS304 stainless steel; 74.7mm to dual 60.5mm piping (approx. 2.9 in to dual 2.4 in)
  • Dual 97mm burnt titanium tips
  • Built-in resonance pipe eliminates low exhaust resonance; 90 dB
  • 33 lbs vs approx. 46 lbs stock
  • Includes mid/center pipe; bolts to the OEM downpipe; gaskets and hardware included
  • Note: GrimmSpeed Subaru Stock DP to Aftermarket 3 in. Catback Adapter (p/n 077046) required when retaining the stock J-pipe/downpipe
  • HKS part 31006-BF001

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