Killer Bee 321 Stainless Holy Header/Up-Pipe

The Holy Header is a short, equal-length 4-1 header and matching V-band up-pipe built to keep exhaust velocity and turbine energy high across the rev range.

Why I would use it: I would use this on an OEM-location EJ turbo setup when response matters just as much as peak power. The compact primary layout builds pressure quickly, while the symmetrical merge supports strong flow at higher rpm.

• Thick-wall 321 stainless-steel construction for sustained exhaust heat
• Cast 347/321 stainless high-velocity merge collector
• Short, symmetrical mandrel-bent primaries
• Included V-band up-pipe creates a complete matched system
• Compatible with OEM EJ25 and Killer B performance oil pans

Fitment: 2004+ STi, 2002-2014 WRX, 2004-2013 Forester XT, 2004-2009 Outback XT, 2004-2009 Legacy GT