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5 to 1/8 PT adapter
has been working closely with Verus Motorsports for the last two years
[Concept 3] Added Control Functions Responding to Driver's Intention
ETS Titanium Top Mount Charge Pipe Burned Finish
using factory holes
Killer B Motorsport 4-1 Holy Header DIY Rotated - Subaru Models (inc. 2002-2014 WRX / 2004-2021 STI) Suspension>Control Arms 5 to 1/8 PT adapterSymmetrical 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 response and the ability to hold more power higher into the revs. The Killer B Motorsport Holy Header was developed using state of the art CAD software & simulations to determine optimal design to increase power in the mid to high