Killer B Motorsport 4-1 Holy Header 2-Bolt Coated - Subaru EJ Models (inc. 2002-2014 WRX / 2004-2021 STI) Subaru-STI-2007

Killer B Motorsport 4-1 Holy Header 2-Bolt Coated - Subaru EJ Models (inc. 2002-2014 WRX / 2004-2021 STI) Subaru-STI-2007Symmetrical 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

Cryo Treating Option: Without Cryo Treating

These are versatile in terms of ride height which by the way

These springs strike a great balance—delivering sportier performance while still maintaining a smooth and compliant ride

The AEM Wideband O2 UEGO Gauge features large LED numerals which enable the user to see when there's even a

Compressor Wheel Measurements: 59

OEM Replacement

Side Mount Hardware Kit (#50002)

The spoke rises from the rim well through to the center section to provide an ultimate concave design while maintaining rigidity and strength as priority

5-ply silicone construction w/fiber reinforcement between each layer of silicone

304 stainless steel fire ring

The filter is not included in the mount kit

Weight: ~17lbs