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HKS Hi-Power Cat Back Exhaust - Subaru WRX/STI 2015+
HKS Hi-Power Cat Back Exhaust - Subaru WRX/STI 2015+
HKS Hi-Power Cat Back Exhaust - Subaru WRX/STI 2015+
HKS Hi-Power Cat Back Exhaust - Subaru WRX/STI 2015+
HKS Hi-Power Cat Back Exhaust - Subaru WRX/STI 2015+
HKS Hi-Power Cat Back Exhaust - Subaru WRX/STI 2015+
HKS Hi-Power Cat Back Exhaust - Subaru WRX/STI 2015+
HKS Hi-Power Cat Back Exhaust - Subaru WRX/STI 2015+
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User Media for: HKS Hi-Power Cat Back Exhaust - Subaru WRX/STI 2015+
User Media for: HKS Hi-Power Cat Back Exhaust - Subaru WRX/STI 2015+
User Media for: HKS Hi-Power Cat Back Exhaust - Subaru WRX/STI 2015+
User Media for: HKS Hi-Power Cat Back Exhaust - Subaru WRX/STI 2015+
User Media for: HKS Hi-Power Cat Back Exhaust - Subaru WRX/STI 2015+
User Media for: HKS Hi-Power Cat Back Exhaust - Subaru WRX/STI 2015+
User Media for: HKS Hi-Power Cat Back Exhaust - Subaru WRX/STI 2015+
User Media for: HKS Hi-Power Cat Back Exhaust - Subaru WRX/STI 2015+
User Media for: HKS Hi-Power Cat Back Exhaust - Subaru WRX/STI 2015+
User Media for: HKS Hi-Power Cat Back Exhaust - Subaru WRX/STI 2015+

HKS Hi-Power Cat Back Exhaust

Subaru WRX/STI 2015+

Read 5 Reviews | 5 Q&As
Part # 31006-BF001
$962.68
msrp: $1,300.00

Estimated to ship in 2 days
ANY QUESTIONS?

Features & Product Details

RallySport Direct proudly carries performance upgrades by one of the biggest names in the industry, HKS. Since 1973, HKS has been a leading innovator in turbocharger technology, and many of their products have been utilized on world-class race cars of all makes and genres. Today, HKS continues to engineer high-performance engine components to improve the power and the performance of your vehicle. 

 

This is the HKS Hi-Power Exhaust System. This exhaust system features a larger piping diameter, smooth bends, and durable stainless steel construction to provide your vehicle with a lifetime worth of performance. The design removes any restrictions to the exhaust flow that is associated with the OEM design, allowing your engine to exhale much easier for improved horsepower and torque, all while creating an aggressive exhaust note. 

 

 

 

 

DETAILS:

  • 304 stainless steel construction
  • 3" piping diameter
  • Dual Hi-Power mufflers with 4" burnt exhaust tips
  • Smooth bends
  • Improves the exhaust flow
  • Reduces turbo lag
  • Creates more power, performance, and improves the low-end torque
  • Produces an aggressive exhaust note
  • Exhaust hangers welded onto the OEM location to make for a direct exhaust replacement
  • Will include new hardware and O-ring gaskets
  •  

    Product Video

    Specifications

    Brand: HKS
    Exhaust Orientation: Angled Exit
    Installation Hardware Included: Yes
    Piping Coating: No
    Piping Flex Joint: No
    Piping ID: 3.00in
    Piping Material: 304 Stainless Steel
    Piping Taper: No
    Silencer Included: No
    Tip Material: Titanium
    Tip Qty: 2
    Tip Shape: Round
    Tip Size: 4.00in
    Mfgr. Warranty: 1 Year
    Condition: New Product
    Return Policy:
    Standard

    PEOPLE WHO VIEWED THIS ITEM ALSO VIEWED

    REVIEWS & CUSTOMER MEDIA

    5 Reviews
    5 out of 5 Stars
    5 Stars
    (5)
    4 Stars
    (0)
    3 Stars
    (0)
    2 Stars
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    1 Stars
    (0)
    Customer Photos and Videos
    HKS Hi-Power Cat Back Exhaust ( Part Number: 31006-BF001)
    HKS Hi-Power Cat Back Exhaust ( Part Number: 31006-BF001)
    HKS Hi-Power Cat Back Exhaust ( Part Number: 31006-BF001)
    HKS Hi-Power Cat Back Exhaust ( Part Number: 31006-BF001)
    HKS Hi-Power Cat Back Exhaust ( Part Number: 31006-BF001)
    HKS Hi-Power Cat Back Exhaust ( Part Number: 31006-BF001)
    HKS Hi-Power Cat Back Exhaust ( Part Number: 31006-BF001)
    HKS Hi-Power Cat Back Exhaust ( Part Number: 31006-BF001)
    HKS Hi-Power Cat Back Exhaust ( Part Number: 31006-BF001)
    HKS Hi-Power Cat Back Exhaust ( Part Number: 31006-BF001)
    1 of 1 people found the following review helpful
    Virtually drone free with a beautiful HKS exhaust note 2 years ago
    5out of 5stars
    STIChris722
    this install was very simple, but plan on buying a spring bolt set at your local parts store. My car had 11K miles on it and the bolts broke upon removal. I took the liberty of putting a Subaru OEM donut gasket on the down pipe. The beautiful thing is that this midpipe mates up to a 2.5" DP. The sound of this exhaust is super throaty and is nothing like the Invidia N1 Dual. Much better sound IMO. There is very little drone (if at all any), between 55mph and 70mph. Go higher than that and it's going to get louder in the vehicle. I am still able to use my Bluetooth in the vehicle though if that says anything.
      
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    1 of 1 people found the following review helpful
    HKS perfection 4 years ago
    5out of 5stars
    KyleTheGrouch
    HKS delivered on this exhaust. It’s sound is absolutely amazing! It’s build quality is out of this world. Enough said. PS. THIS DOES NOT REQUIRE THE STOCK DOWNPIPE TO 3in ADAPTER. JUST GET A NEW OEM CRUSH GASKET.
      
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    1 of 1 people found the following review helpful
    HKS EXHAUST WORTH EVERY PENNY 5 years ago
    5out of 5stars
    soprisrida27519
    I have had my eye on this exhaust for a long time, constantly watching videos on rallysport just waiting by the side lines to finally pull the trigger, enough was enough and i finally had to do it, and let me tell you what, i REGRET NOTHING, this thing is amazing, it sounds amazing it looks amazing and i can even feel a difference in the throttle response. Windows are always down and i absolutely love everything about this, HKS is a really high quality piece of art and rallysport helped me get everything i needed and shipped to me right away. This is truely what a subaru should sound like
      
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    A great exhaust for street or track 6 years ago
    5out of 5stars
    Rick C.
    Seriously what an awesome exhaust. It looks killer on the back of our 2015 STI and sounds even better! Do not let the canister type design fool you, this exhaust is mild when you're just cruising around, and mean when you mash on the throttle. Fitment is perfect and the quality is a 10.
      
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    1 of 1 people found the following review helpful
    HKS Hi-Power Cat Back Exhaust 6 years ago
    5out of 5stars
    Michael N.

      
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    QUESTIONS & ANSWERS

    • Q: turbo back  Lester3 years ago

      What j pipe will go best with this exhaust to make a full turbo back exhaust system?
      • 0 of 0 people found the following answer helpful

        A:  This will work with an OEM style 2.5" flange, or will bolt up to 3" J pipes with an adapter.

        Marcus E. @ RallySport Direct 2 years ago  
          
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    • Q: Hks hi-power exhaust  Lester3 years ago

      Hi, does this exhaust fit on a 2018 wrx? Also, would it need an adapter to fit on a stock downpipe?
    • Q: Volume  RayTheCaptain4 years ago

      Compared to the invidia N1 dual catback exhaust, is this louder or softer? What's a good comparison for cabin volume? And is there any drone?
      • 0 of 0 people found the following answer helpful

        A:  This will be a bit quieter than the N1 exhaust and drone won't be too bad. Best thing to do is listen to sound clips of both exhausts.

        Luis L. @ RallySport Direct 4 years ago  
          
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