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Killer B Motorsport 4-1 Holy Header DIY Rotated Subaru WRX 02-14/STI 04-16/Legacy GT 05-09/Forester XT 04-13

Killer B Motorsport 4-1 Holy Header DIY Rotated Subaru WRX 02-14/STI 04-16/Legacy GT 05-09/Forester XT 04-13

Killer B Motorsport

  • $ 1,39600
  • Save $ 29


  • Brand: Killer B Motorsport
  • Part #: HH-DIY
  • Includes Catalytic Converter: No
  • Installation Hardware Included: No
  • Manifold Design: Equal Length
  • Piping Coating: No
  • Piping Flex Joint: No
  • Piping Material: 321 Stainless Steel
  • Rotated Setup: Yes
  • Mfgr. Warranty: Lifetime

    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.


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