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Killer B Motorsport 4-1 Holy Header 2-Bolt - Subaru Models (inc. 2002-2014 WRX / 2004+ STI)
Killer B Motorsport 4-1 Holy Header 2-Bolt - Subaru Models (inc. 2002-2014 WRX / 2004+ STI)
Killer B Motorsport 4-1 Holy Header 2-Bolt - Subaru Models (inc. 2002-2014 WRX / 2004+ STI)
Killer B Motorsport 4-1 Holy Header 2-Bolt - Subaru Models (inc. 2002-2014 WRX / 2004+ STI)
Killer B Motorsport 4-1 Holy Header 2-Bolt - Subaru Models (inc. 2002-2014 WRX / 2004+ STI)
Killer B Motorsport 4-1 Holy Header 2-Bolt - Subaru Models (inc. 2002-2014 WRX / 2004+ STI)
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User Media for: Killer B Motorsport 4-1 Holy Header 2-Bolt - Subaru Models (inc. 2002-2014 WRX / 2004+ STI)
User Media for: Killer B Motorsport 4-1 Holy Header 2-Bolt - Subaru Models (inc. 2002-2014 WRX / 2004+ STI)
User Media for: Killer B Motorsport 4-1 Holy Header 2-Bolt - Subaru Models (inc. 2002-2014 WRX / 2004+ STI)
User Media for: Killer B Motorsport 4-1 Holy Header 2-Bolt - Subaru Models (inc. 2002-2014 WRX / 2004+ STI)
User Media for: Killer B Motorsport 4-1 Holy Header 2-Bolt - Subaru Models (inc. 2002-2014 WRX / 2004+ STI)
User Media for: Killer B Motorsport 4-1 Holy Header 2-Bolt - Subaru Models (inc. 2002-2014 WRX / 2004+ STI)
User Media for: Killer B Motorsport 4-1 Holy Header 2-Bolt - Subaru Models (inc. 2002-2014 WRX / 2004+ STI)
User Media for: Killer B Motorsport 4-1 Holy Header 2-Bolt - Subaru Models (inc. 2002-2014 WRX / 2004+ STI)
User Media for: Killer B Motorsport 4-1 Holy Header 2-Bolt - Subaru Models (inc. 2002-2014 WRX / 2004+ STI)
User Media for: Killer B Motorsport 4-1 Holy Header 2-Bolt - Subaru Models (inc. 2002-2014 WRX / 2004+ STI)

Killer B Motorsport 4-1 Holy Header 2-Bolt

Subaru Models (inc. 2002-2014 WRX / 2004+ STI)

Was: $1,259.10
$1,119.20
You save:
11%
($139.90)
msrp: $1,399.00

In stock!
You will earn Reward Points with this Purchase.
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Features & Product Details

RallySport Direct proudly carries an excellent collection of quality upgrades brought to you by the metal artists at Killer B Motorsport. 

 

This example is the popular Killer B Motorsport 321 Stainless Steel 2-bolt Holy Header. This header and/or exhaust manifold is a great way to increase the exhaust flow due to the smooth bends in the design that will optimize the exhaust flow. This will help maximize the flow potential of your turbocharger which will also reduce the spool time. This is an equal-length design that will produce an aggressive exhaust note while improving the performance and response throughout the entire RPM band. 

 

 

 

DETAILS:

  • CAST COLLECTOR: The collector is made of thick-walled cast 347 stainless. This design removes several welds which removes flow disruption for less turbulence. This also allows the collector to be designed as a true high-velocity merge.
  • SHORT EQUAL LENGTH PRIMARIES: Shorter length primaries make for an equal length header which means less header volume and quick spool up. 
  • SYMMETRICAL PRIMARY DESIGN: A similar tube length and bend geometry keeps the pulse velocities high and consistent when compared to equal length headers with different non-symmetrical primary tubing geometry.
  • SMOOTH MANDREL BENDS: All the bends utilize a mandrel to promote non-restrictive flow, and Killer B uses the largest bends possible at every location. 
  • THICK WALLED 321 STAINLESS STEEL CONSTRUCTION: 321 is alloyed with titanium which not only costs more but it is ideal to handle the elements of extreme heat found in the turbocharger. With that being said, the turbocharger will create heat that will surpass the limits of 304 stainless steel, and 321 is more robust to promote longer life. 
  • 2-BOLT UP PIPE CONNECTION: Allows for connection of 2-bolt flange style up-pipe connection
  • Weighs 17lbs
  • Works with OEM EJ25 oil pans along with the Killer B Motorsport Performance Aluminum Oil Pan
  • Made in the USA
  •  

     

    NOTE:

  • May not fit some Forester, Outback, and Legacy models with the OEM oil pan and cooler
  • Specifications

    Brand: Killer B Motorsport
    Includes Catalytic Converter: No
    Installation Hardware Included: No
    Manifold Design: Equal Length
    Piping Coating: No
    Piping Flex Joint: No
    Piping Material: 321 Stainless Steel
    Mfgr. Warranty: Lifetime
    Condition: New Product
    Return Policy:
    Standard

    PEOPLE WHO VIEWED THIS ITEM ALSO VIEWED

    REVIEWS & CUSTOMER MEDIA

    9 Reviews
    4.9 out of 5 Stars
    5 Stars
    (8)
    4 Stars
    (1)
    3 Stars
    (0)
    2 Stars
    (0)
    1 Stars
    (0)
    Customer Photos and Videos
    Killer B Motorsport 4-1 Holy Header 2-Bolt ( Part Number: HH-2BOLT)
    Killer B Motorsport 4-1 Holy Header 2-Bolt ( Part Number: HH-2BOLT)
    Killer B Motorsport 4-1 Holy Header 2-Bolt ( Part Number: HH-2BOLT)
    Killer B Motorsport 4-1 Holy Header 2-Bolt ( Part Number: HH-2BOLT)
    Killer B Motorsport 4-1 Holy Header 2-Bolt ( Part Number: HH-2BOLT)
    Killer B Motorsport 4-1 Holy Header 2-Bolt ( Part Number: HH-2BOLT)
    Killer B Motorsport 4-1 Holy Header 2-Bolt ( Part Number: HH-2BOLT)
    Killer B Motorsport 4-1 Holy Header 2-Bolt ( Part Number: HH-2BOLT)
    Killer B Motorsport 4-1 Holy Header 2-Bolt ( Part Number: HH-2BOLT)
    Killer B Motorsport 4-1 Holy Header 2-Bolt ( Part Number: HH-2BOLT)
    High Cool Factor 6 months ago
    5out of 5stars
    TKfromSA
    These fit great and are very high quality. Oil filters are easy to change.
      
    Was this review helpful?
    Great purchase! 2 years ago
    5out of 5stars
    Legacy guy
    Just installed this header over the weekend on my 07 spec.b. It fits perfectly with the oem oil cooler and sounds great!
      
    Was this review helpful?
    3 of 3 people found the following review helpful
    Wow! 3 years ago
    5out of 5stars
    MikeW177
    I was running an upgraded crosspipe w/ stock headers bc I was afraid to lose that subie sound, but I can say I’m not disappointed.. EL headers definitely change the sound, but I had a small exhaust leak prior which is now fixed and these look and sound great! KillerB products are more expensive for a reason. Quality is top-notch and they are 321 SS! Also, the OEM sensor has plenty of length after an easy reroute.
      
    Was this review helpful?
    6 of 6 people found the following review helpful
    Sound AND Performance?? Can't be beat. 4 years ago
    5out of 5stars
    BGleadz
    I was nervous about going to equal length headers because I didn't want to lose that classic boxer rumble. However the rest of the exhaust was already upgraded and this was the last piece, it didn't make sense to stay stock. After just seeing the product in my hands I knew I made the right choice. The build quality is phenomenal and the welds and pristine. You just have to look at it to know these are quality headers and worth every penny. After install I was truly blown away by the sound I still produced with these headers. I still have a bit of that rumble but it's even deeper now and the car sounds amazing.
      
    Was this review helpful?
    1 of 1 people found the following review helpful
    Best money ever spent  4 years ago
    5out of 5stars
    Waftic
    I can't say enough, wow just an amazing piece of artwork that fit so flawlessly and performs sooo much better then.... Well every other header on the market. Truly worth every penny. Ps 07 sti clears factory filter with room but my fan shroud had a wired tab that stuck out and hit the header. Idk what it's there for but I went ahead and cut it off lol fits perfectly.
      
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    QUESTIONS & ANSWERS

    • Q: up pipe  Wes4 years ago

      Do these headers come with an up pipe?
      • 0 of 0 people found the following answer helpful

        A:  This does not come with an uppipe.

        Michael N.
          
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    • Q: Rotated Turbo Setup  paullyd36364 years ago

      I own a 2007 Sti and I have the ETS rotated turbo kit but didn't get the header with the kit. Will this header reach the location adding the ETS rotated kit uppipe?
      • 0 of 0 people found the following answer helpful

        A:  Sadly, we cannot confirm fitment between those parts.

        Devan M. @ RallySport Direct 4 years ago  
          
        Was this answer helpful?
      • 0 of 0 people found the following answer helpful

        A:  ETS uses and up-pipe that matches the OEM 2-bolt flange location. As does this header, so there should be no problem. We have many customers running ETS rotated kits with our header :)

        Katy Boyd @ Killer B Motorsport 4 years ago  
          
        Was this answer helpful?
    • Q: Pairing this with Perrin UpPipe  lowbee4 years ago

      I am trying to pair the Killer B 2-bolt header with a Perrin UpPipe and I am having trouble selecting the regular sized 1.75" UpPipe or their big tube 2" UpPipe. Can you tell me which size is better for fast spool ?
      • 1 of 1 people found the following answer helpful

        A:  A smaller uppipe will spool quicker, a larger one will have more flow for top end power. Typically, oversized uppipes/large diameter headers are only advisable on a motor that will rev higher than stock on a large turbo.

        Marcus E. @ RallySport Direct 4 years ago  
          
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    • Q: Which one do I need?  OOGA4 years ago

      I have a 2011 WRX with a Grimmspeed up pipe. Do I need to get one with egt bung or without?
    • Q: O2 sensor wire length   13stisedan4 years ago

      This reviewer said this here 'Now i ran into one issue that no one seemed to talk about and it was that my o2 harness didnt quite reach. so i bought a extension from Godacca buisiness' . Any truth to this about the killer B header? I have a 2013 Sti.
      • 0 of 0 people found the following answer helpful

        A:  It depends on the model year, but rerouting the factory harness should get you there without any modification.

        Devan M. @ RallySport Direct 4 years ago  
          
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