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