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HKS Racing Cat Back Exhaust - Subaru WRX / STI 2011-2014
HKS Racing Cat Back Exhaust - Subaru WRX / STI 2011-2014
HKS Racing Cat Back Exhaust - Subaru WRX / STI 2011-2014
HKS Racing Cat Back Exhaust - Subaru WRX / STI 2011-2014
HKS Racing Cat Back Exhaust - Subaru WRX / STI 2011-2014
HKS Racing Cat Back Exhaust - Subaru WRX / STI 2011-2014
HKS Racing Cat Back Exhaust - Subaru WRX / STI 2011-2014
HKS Racing Cat Back Exhaust - Subaru WRX / STI 2011-2014
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User Media for: HKS Racing Cat Back Exhaust - Subaru WRX / STI 2011-2014
User Media for: HKS Racing Cat Back Exhaust - Subaru WRX / STI 2011-2014

HKS Racing Cat Back Exhaust

Subaru WRX / STI 2011-2014

Read 5 Reviews | 9 Q&As
Part # 31008-BF003
$645.00
msrp: $750.00

Ships within 10 days
ANY QUESTIONS?

Features & Product Details

If you're in the market for a quality high-performance exhaust system, then you will be pleased with the HKS Racing Muffler for the 11-14 Subaru WRX / STI. This is a single-exit exhaust system that is a direct replacement of your OEM exhaust system. It has been designed with smooth bends to reduce turbulence under acceleration which will improve initial throttle response and will add more horsepower and torque. 

New gaskets and hardware will be included with this exhaust system, and exhaust hangers have been welded on the OEM locations so no further modifications to the body will be needed. The piping has been coated black for extra protection against rust and corrosion, while the muffler will come in a nice polished finish with a titanium finished tip. 

Specifications

Brand: HKS
Exhaust Orientation: Angled Exit
Installation Hardware Included: Yes
Piping Coating: Yes
Piping Flex Joint: No
Piping ID: 3.35in
Piping Material: 304 Stainless Steel
Piping Taper: No
Silencer Included: No
Tip Material: Titanium
Tip Qty: 1
Tip Shape: Round
Tip Size: 4.75in
Mfgr. Warranty: 1 Year
Condition: New Product
Return Policy:
Standard

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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
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Customer Photos and Videos
HKS Racing Cat Back Exhaust ( Part Number: 31008-BF003)
HKS Racing Cat Back Exhaust ( Part Number: 31008-BF003)
Great Product  10 months ago
5out of 5stars
Slopez
Excellent product! Sounds excellent, installation and fitment were great. Tapers to fit with factory downpipe which is nice.
  
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1 of 1 people found the following review helpful
Worth Every Penny! 1 year ago
5out of 5stars
GLDUDE
Sounds amazing, I run it without the silencer and it’s perfect, deep and loud and makes throttle response great, no turbulence and I’m able to achieve my full 18.50 lbs of boost on my stage 2+sf tune from Cobb. Look no further, best single exit exhaust at the best price!
  
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Great Exhaust for the price you pay 2 years ago
5out of 5stars
Jay Lay
I've had this exhaust for a while now and I believe its the best sounding one. It's got a really nice deep tone in idle and sounds like a beast from hell at 6k rpm. Also for the price you pay you have something just as good as Tomei with out spending excess. Bottom line I would recommend this exhaust to anyone that wants a clean sounding exhaust that works great.
  
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1 of 1 people found the following review helpful
HKS Racing Cat Back 3 years ago
5out of 5stars
ccauton18824
Let me first start to say that this exhaust far exceeded my expectations! The build, weight and fit is amazing. This item does come with an installed silencer. With the silencer on, it’s just as loud and only a bit deeper tone then an SPT exhaust. What’s also cool is when you pull the silencer off, the muffler tip is adjustable so you can set how much you actually want it to stick out past your bumper. With the silencer removed, the sound is deep and pretty loud (compared to SPT)... it has a much deeper and cleaner rumble at 2-3k rpms and sounds amazing at freeway speeds and at WOT. Throttle response is lighter and car responds so much better with little to no drone... it can finally breath and sound like a true Subaru STI.
  
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5 of 5 people found the following review helpful
HKS HI POWER EXHAUST  3 years ago
5out of 5stars
8082k11
Installtion was a breeze.took about less then an hour to install. The sound is a deep rumble when idle and even a low rpms when drivin. There's no drone on mid or hi rpm,I really love this exhaust. Best exhaust I got so far.
  
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QUESTIONS & ANSWERS

  • Q: Downpipe attachment  Nathanjentes19974 months ago

    Will this attach to a 3 inch catless downpipe without an adapter or will i need to source an adapter
    • 0 of 0 people found the following answer helpful

      A:  Since the this catback necks down to meet the factory 2.5" downpipe, you would need a 3" downpipe to 2.5" OEM style catback adapter.

      Lane H. @ RallySport Direct 3 months ago  
        
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  • Q: 2015+ fitment  Derek5 months ago

    Will this exhaust fit on a 2015+ Sti?
    • 0 of 0 people found the following answer helpful

      A:  Not officially according to HKS, we also have not tried it ourselves. But some exhausts do interchange between the GV and VA chassis, so unfortunately the best answer I can give you is a "No."

      Lane H. @ RallySport Direct 3 months ago  
        
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  • Q: Require tune   Lars 3 years ago

    Will this HKS cat back require a tune after installation?
  • Q: down pipe fitment  j.borelli91444193 years ago

    Is the inlet to this exhaust at the flange 3 inch or factory sizing. I have a 3 inch Tomei down pipe and I'd like to avoid a step down to just step back up again. I noticed in the pictures it stepped down quite a bit towards the flange
  • Q: fitment  Gavan213 years ago

    any way possible to make this work with a 2013 hatch sti even if its just the axle back section