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  • Killer B 321 Stainless Holy Header w/EWG | Subaru WRX 08-14 & STI 04-20 (HH-EWG)
  • Killer B 321 Stainless Holy Header w/EWG | Subaru WRX 08-14 & STI 04-20 (HH-EWG)
  • Killer B 321 Stainless Holy Header w/EWG | Subaru WRX 08-14 & STI 04-20 (HH-EWG)
  • Killer B 321 Stainless Holy Header w/EWG | Subaru WRX 08-14 & STI 04-20 (HH-EWG)
  • Killer B 321 Stainless Holy Header w/EWG | Subaru WRX 08-14 & STI 04-20 (HH-EWG)

    MAP price match guarantee SET YOUR BUILD GOALS & GO!
    Stimulate Your Ride For the New Year!

    Killer B Motorsports

    Killer B 321 Stainless Holy Header w/EWG | Subaru WRX 08-14 & STI 04-20

    PART#
    Unbeatable Price Guarantee

    ( Honestly, if you find a better price we'll match it. )

    Give us a call to get the best prices and parts for your build. Or, just call us with a cool racing story...either way we're here.

    Email - sales@maperformance.com

    Phone 1-888-627-3736



    $ 1,799.00

    MAP price match guarantee Unbeatable Price Guarantee

      +1-888-627-3736
    this item typically ships in 8-12 weeks!
    Free delivery by , to your door when ordered within hrs and mins
    Fits Your
    MAP Loyalty: Earn $ 35.98 Toward Next Purchase!

    321 Stainless Holy Header W/EWG by Killer B Motorsport

    The Killer B Motorsport Holy Header was developed using state of the art CAD software & simulations to determine optimal design to increase power as much as possible throughout the rev range. Short as possible primaries with a single secondary significantly decrease header volume allowing exhaust gas pressure to build quickly. Symmetrical 4-1 design maintains high and consistent exhaust velocity as RPMs rise. You can expect faster spool up time compared to long primary/double secondary designs. A difference you will immediately notice in throttle/boost response and the ability to hold more power higher into the revs.

    Features

    • Cast Collector
    • Short Equal Length Primaries
    • Symmetrical Primary Design
    • Smooth Mandrel Bends
    • Thick Walled 321 Stainless Steel Construction for Long Life
    • High Heat Retention
    • Made in the USA and Killer B quality!

    Applications

    • 2002-2014 Subaru WRX
    • 2004-2020 Subaru WRX STI

    What's In The Box?

    • Header w/ EWG

    Warranty

    • Manufacturer Standard Warranty (will not honor warranty on wrapped headers)

      321 Stainless Holy Header W/EWG by Killer B Motorsport

      The Killer B Motorsport Holy Header was developed using state of the art CAD software & simulations to determine optimal design to increase power as much as possible throughout the rev range. Short as possible primaries with a single secondary significantly decrease header volume allowing exhaust gas pressure to build quickly. Symmetrical 4-1 design maintains high and consistent exhaust velocity as RPMs rise. You can expect faster spool up time compared to long primary/double secondary designs. A difference you will immediately notice in throttle/boost response and the ability to hold more power higher into the revs.

      Features

      • Cast Collector
      • Short Equal Length Primaries
      • Symmetrical Primary Design
      • Smooth Mandrel Bends
      • Thick Walled 321 Stainless Steel Construction for Long Life
      • High Heat Retention
      • Made in the USA and Killer B quality!

      Applications

      • 2002-2014 Subaru WRX
      • 2004-2020 Subaru WRX STI

      What's In The Box?

      • Header w/ EWG

      Warranty

      • Manufacturer Standard Warranty (will not honor warranty on wrapped headers)

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        MAP Limited Lifetime Warranty

        1.) All MAPerformance in-house fabricated parts include a Limited Lifetime Warranty for the Original Purchaser. This warranty only applies to the original purchaser and is non-transferrable. If the product fails it would need to be determined by MAPerformance that it is due to manufacturing defects in materials or workmanship.

        2.) This does not cover normal wear and tear. Improper use, modification, or abuse voids this warranty. MAPerformance will not be held responsible for additional costs due to the failure of a product (cost of sale, towing, labor, etc.). Warranty claims must be submitted to MAPerformance for review.

        3.) You must create a support ticket to acquire your return authorization number prior to returning the product.

        4.) Warranty claims will not be honored if the product was not purchased through an approved dealer.

        For warranty evaluation please create a support ticket via this form here.

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