Killer B Motorsports Holy Header Max - 2002-2014 Subaru WRX / 2004-2021 STI / 2004-2013 Forester

The Killer B Motorsport Holy Header VE-Max was developed using state of the art CAD software, simulations, and testing, to determine optimal high power and RPM efficiency. I High velocity merge collector into a stepped 2.5" secondary, the Holy Header VE-Max is for very high flow applications. Symmetrical 4-1 design maintains consistent and high velocity exhaust gas flow as RPMs rise.

Killer B Motorsports Holy Header Max

---

Highlights

• Large Secondary. The Holy Header Max was designed for higher flow rates with s stepped and large diameter secondary, 2.5".
• Cast Collector. Stronger than tubing, made from 347 (321) stainless. A true high velocity merge design is superior to fabricated tube collectors.
• Short Equal Length Primaries. The shortest possible length primaries you can have on an Equal Length header for improved transient response.
• Symmetrical Primary Design. All primaries have a similar tube length and bend geometry.
• Smooth Mandrel Bends. Large radius bends utilize a mandrel for smooth non-restrictive flow.
• Thick Walled 321 Stainless Steel Construction for Long Life. 321 is alloyed with titanium. 321 stainless steel has higher strength and toughness at elevated temperatures.
• Made in the USA and Killer B quality! Every Header setup is inspected, assembled and pressure tested before it ships to assure a leak free setup!
• Works with OEM EJ25 Oil Pans, and Killer B Motorsport Performance Aluminum Oil Pan. Fits All WRX & STi EJ Series Engines.
• We do not warranty wrapped headers.

The Killer B Motorsport Holy Header VE-Max was developed using state of the art CAD software, simulations, and testing, to determine optimal high power and RPM efficiency. I High velocity merge collector into a stepped 2.5" secondary, the Holy Header VE-Max is for very high flow applications. Symmetrical 4-1 design maintains consistent and high velocity exhaust gas flow as RPMs rise.