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321 Stainless Holy Header 2-Bolt

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Product code: HH-2BOLT

Availability: Backordered. Approximately an 8-10 week leadtime.


All headers are made to order. Roughly a 8-10 week lead time.
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.


"Works with any 2-Bolt Up-Pipe, including rotated

  • Two-Bolt Reduced cost! 
  •  Up-Pipe not included"

Additional Information

Attributes 2004-2015 STi, 2002-2014 WRX, 2004-2013 Forester XT, 2004-2009 Outback XT, 2004-2009 Legacy GT
Standard Color No
Part Number No

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