Killer B Motorsport 4-1 Holy Header w/ Uppipe - 02-14 WRX / 04-20 STI

Killer B  are pure artists in metal fabrication, and they have a large catalog with a wide variety of performance enhancing, oiling, fabrication components, along with accessories for your interior, exterior, or your engine bay.  Here you are looking at the Killer B Motorsport 321 Stainless Steel Holy Header. This particular header will come with the 2-bolt up pipe option, and it will also come equipped with an EGT sensor bung. This header is a great option for those of you looking to improve the sound and power throughout the entire RPM range.  Here are some key features: Cast Collector: The collector is made of thick walled cast 347 stainless. This design removes several welds which removes flow disruption for less turbulence. This also allows the collector to be designed as a true high-velocity merge. Short Equal Length Primaries: Shorter length primaries make for an equal length header which means less header volume and quick spool up.  Symmetrical Primary Design: A similar tub