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Killer B Motorsport 4-1 Holy Header (Part Number: )
Killer B Motorsport 4-1 Holy Header (Part Number: )
Killer B Motorsport 4-1 Holy Header (Part Number: )
Killer B Motorsport 4-1 Holy Header (Part Number: )
Killer B Motorsport 4-1 Holy Header (Part Number: )
Killer B Motorsport 4-1 Holy Header (Part Number: )
Killer B Motorsport 4-1 Holy Header (Part Number: )
Killer B Motorsport 4-1 Holy Header (Part Number: )
Killer B Motorsport 4-1 Holy Header (Part Number: )
Killer B Motorsport 4-1 Holy Header (Part Number: )
Community Media
Killer B Motorsport 4-1 Holy Header (Part Number: )
Killer B Motorsport 4-1 Holy Header (Part Number: )
Killer B Motorsport 4-1 Holy Header (Part Number: )
Killer B Motorsport 4-1 Holy Header (Part Number: )
Killer B Motorsport 4-1 Holy Header (Part Number: )
Killer B Motorsport 4-1 Holy Header
Subaru Models (inc. 2002-2014 WRX / 2004+ STI)
Read 8 Reviews | 38 Q&As
Part # HH4-1
$1,645.00

In stock! Ships same day

Features & Product Details

RallySport Direct is proud to bring you quality craftsmanship brought to you by Killer B Motorsport. Killer B  are pure artists in metal fabrication, and they have a large catalog with a wide variety of performance enhancing, oiling, fabrication components, along with accessories for your interior, exterior, or your engine bay. 

Here you are looking at the Killer B Motorsport 321 Stainless Steel Holy Header. This particular header will come with the 2-bolt up pipe option, and it will also come equipped with an EGT sensor bung. This header is a great option for those of you looking to improve the sound and power throughout the entire RPM range. 

Here are some key features:

  • 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 for Long Life: 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. 
  • V-Band Up Pipe Connection for fast and easy installation without leaks and for perfect alignment
  • Up Pipe Included and has been specifically designed to work hand and hand with the Holy Header
  • 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 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:

    RallySport Guarantee - 30 Days


    Items that are covered under the RallySport Guarantee offer a 30 day no questions asked return policy.

    RallySport Guarantee items may be returned within 30 days of the original invoice date and must include all the original parts and contents for a refund.

    The RallySport Guarantee does not apply to products that have been modified, damaged, misused or abused. All returns require an RMA (Return Merchandise Authorization) Number, and freight charges are strictly non-refundable. For more information regarding our freight refund policy, please refer to our return policy page found HERE.
    Standard

    PEOPLE WHO VIEWED THIS ITEM ALSO VIEWED

    REVIEWS & CUSTOMER MEDIA

    8 Reviews
    4.6 out of 5 Stars
    5 Stars
    (5)
    4 Stars
    (3)
    3 Stars
    (0)
    2 Stars
    (0)
    1 Stars
    (0)
    Customer Photos and Videos
    Killer B Motorsport 4-1 Holy Header ( Part Number: HH4-1)
    Killer B Motorsport 4-1 Holy Header ( Part Number: HH4-1)
    Killer B Motorsport 4-1 Holy Header ( Part Number: HH4-1)
    Killer B Motorsport 4-1 Holy Header ( Part Number: HH4-1)
    Killer B Motorsport 4-1 Holy Header ( Part Number: HH4-1)
    Good quality header, 2017 install is a bit different.  2 years ago
    cornwrx
    Fitment wasn't spot on from the up-pipe -> header. The piece between the up-pipe and the header (Where the V-Band is) itself was off by about 1/2 an inch. After some prying, everything went smooth. Also on the 2017 models, there is another bracket on the stock up-pipe so you need to push this upwards and down towards the downpipe. (Assuming you're on a lift). Also, you should buy new studs for this up-pipe, we managed to reuse the old ones off the stock up-pipe, but it wasn't easy getting them off. All in all, not a bad purchase. Great quality, but the install on the 2017 is a bit different than the 2015's.
      
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    install 4 years ago
    Heichel84
    I have a 2015 sti with 4k miles thought I could use the original studs. Double nut method or applying heat would not get them out of the old up pipe so best to get new studs. Definitely worth the money though
      
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    install 4 years ago
    Heichel84
    I have a 2015 sti with 4k miles thought I could use the original studs. Double nut method or applying heat would not get them out of the old up pipe so best to get new studs. Definitely worth the money though
      
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    1 of 1 people found the following review helpful
    An excellent addition, even as a daily drive 4 years ago
    Demonik
    Got this two months back. An excellent addition to the car. The torque and throttle response is amazing. My car is a stage 2 with a Milltek turbo back and the car sounds amazing. If you would like to hear it, the clip is below http://youtu.be/1DUJjmWZHIs I am giving it 4 stars because the Greddy Oil Sandwich Adapter GRE 12002801, does not clear the headers. So I had to remove it and I am running without a oil temperature reading at the moment. :(
      
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    1 of 1 people found the following review helpful
    Functional art 4 years ago
    washoepitbulls06123
    2013 wrx process west intercooler/ aem intake/ cobb catted downpipe car lives at 4600 ft / 5000ft elevation pro tuned 248 hp 248 tq on the worst fuel in the country ACN 91 . After install of coated header and a deatschworks 65C pump on stock injectors and retune 263 hp/ 278 Tq on 16 psi of boost injector duty cycle 81%. Better spool and throttle response
      
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    QUESTIONS & ANSWERS

    • Q: Up pipe fitment?  Gatchaman5 months ago

      Will the the Killer B Up Pipe fit a stock turbo or do i have to get after market turbo to make it fit?
    • Q: 2014 Subaru WRX  paulanthony1 year ago

      What size is the v-band on the up-pipe? Also, do you guys sell the Header without the v band up-pipe?
      • 0 of 0 people found the following answer helpful

        A:  The V Band size is 2 inches and is part number VBF2, we do not have it on our site so give us a call if you need to order it. We do sell the header without an uppipe that will be compatible for any 2 bolt uppipe, it is part number KIL HH-2BOLT.

        Tyler G.
          
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    • Q: 05 Subaru legacy gt  Xxeonxx921 year ago

      Does the up pipe come with a place for the oem exhaust temperature sensor?
      • 0 of 0 people found the following answer helpful

        A:  There is not an extra bung on the Killer B uppipe for an extra sensor. Only Subarus with a catted uppipe will see this extra sensor and normally its deleted because it mainly detecting the cats health.

        Evan M. @ RallySport Direct 1 year ago  
          
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    • Q: V-Band   kingsleymorris060331 year ago

      The revelation of V-Band sounds very good, but how reliable is it in rough driving conditions including the occasional dirty road hard driving? I know you have the 2 bolt up-pipe option so which would be better under such conditions?
      • 0 of 0 people found the following answer helpful

        A:  We haven't had any issues come back to us when customers have purchased this product recently. The two bolt option was created so that people with a 2 bolt up pipe EWG could run the headers as well. Personally I wouldn't mind either one but we haven't had any issues with them.

        Tyler A. @ RallySport Direct 1 year ago  
          
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    • Q: Sound  Boxer_WRX3 years ago

      Will this header keep the amazing rumble sound ?
      • 0 of 0 people found the following answer helpful

        A:  This is an equal length header. It will not retain the Subaru rumble, but still sounds great.

        Josh P. @ RallySport Direct 3 years ago  
          
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