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GrimmSpeed OEM Downpipe to 3inch Cat-Back Adapter - Turbocharged Subaru Models

GrimmSpeed OEM Downpipe to 3inch Cat-Back Adapter - Turbocharged Subaru Models

321 Stainless Holy Header/Up-Pipe Combo

321 Stainless Holy Header/Up-Pipe Combo

321 Stainless Holy Header 2-Bolt

$1,339.00
In stock
SKU
dHH-2BOLT

Overview:

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.
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