Joined
·
6,253 Posts
Killer B Motorsport HOLY HEADER - Patent Pending
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 RPM range. Short as possible primaries with a single secondary significantly decrease header volume allowing exhaust gas pressure to build quickly. Symmetrical 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.
![]()
Features include:
•Short Equal Length Primaries. The shortest possible length primaries you can have on an Equal Length header. Short means less header volume and quick spool up.
![]()
• Symmetrical Primary Design. All primaries have a similar tube length AND bend geometry. This keeps the pulse velocities high and consistent compared to equal length headers with different (non-symmetrical) primary tubing geometry.
![]()
• Smooth Mandrel Bends. All of the bends utilize a mandrel for smooth non-restrictive flow. Not only that, we use the largest bend radius possible at every location.
• Thick Walled 321 Stainless Steel Construction for Long Life. 321 is alloyed with titanium, but it’s the ideal material for high temperature turbocharged applications. Would 304 stainless work, yes, but the temperatures on turbocharged cars can exceed the limits of 304 stainless enough to make them brittle and crack. 321 stainless steel has higher strength and toughness at elevated temperatures. It was developed by the aircraft industry specifically to address 304 stainless manifolds that were cracking. Killer B Motorsport is the only company that manufactures full 321 headers.
• Advance Casting Merge Collector. 321 stainless steel merge collector provides a smooth obstruction free path from the primaries to the secondary. This allows exhaust gases to remain less turbulent, therefor retaining the most speed and heat as possible.
![]()
• High Heat Retention. 321 stainless steel conducts less heat than 304 stainless steel. The short primaries and properly sized secondaries also pull less heat from the exhaust gasses increasing turbine efficiency. Large tubing headers expose the exhaust gasses to more surface area transmitting more heat and reducing exhaust energy. You can also ceramic coat our headers (and keep the warranty) without exceeding the temperature range like you can with 304 stainless.
• V-Band Up-Pipe Connection. Why V-Band? Fast, easy, no gasket, no leaks, perfectly concentric alignment of tubes for no disruption of flow.
• Up-Pipe included. This header was designed as a complete system. Using other up-pipes may compromise performance.
• Weighs only 16 pounds (vs. OEM weighs 25 pounds)
• Works with OEM EJ25 Oil Pans, and Killer B Motorsport Performance Aluminum Oil Pan!
• 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!
Swain Tech Coating available as an option. This is the ONLY coating we recommend due to its thermal capability, ability to protect the base material and durability.
OEM gaskets available
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 RPM range. Short as possible primaries with a single secondary significantly decrease header volume allowing exhaust gas pressure to build quickly. Symmetrical 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.
Features include:
•Short Equal Length Primaries. The shortest possible length primaries you can have on an Equal Length header. Short means less header volume and quick spool up.
• Symmetrical Primary Design. All primaries have a similar tube length AND bend geometry. This keeps the pulse velocities high and consistent compared to equal length headers with different (non-symmetrical) primary tubing geometry.
• Smooth Mandrel Bends. All of the bends utilize a mandrel for smooth non-restrictive flow. Not only that, we use the largest bend radius possible at every location.
• Thick Walled 321 Stainless Steel Construction for Long Life. 321 is alloyed with titanium, but it’s the ideal material for high temperature turbocharged applications. Would 304 stainless work, yes, but the temperatures on turbocharged cars can exceed the limits of 304 stainless enough to make them brittle and crack. 321 stainless steel has higher strength and toughness at elevated temperatures. It was developed by the aircraft industry specifically to address 304 stainless manifolds that were cracking. Killer B Motorsport is the only company that manufactures full 321 headers.
• Advance Casting Merge Collector. 321 stainless steel merge collector provides a smooth obstruction free path from the primaries to the secondary. This allows exhaust gases to remain less turbulent, therefor retaining the most speed and heat as possible.
• High Heat Retention. 321 stainless steel conducts less heat than 304 stainless steel. The short primaries and properly sized secondaries also pull less heat from the exhaust gasses increasing turbine efficiency. Large tubing headers expose the exhaust gasses to more surface area transmitting more heat and reducing exhaust energy. You can also ceramic coat our headers (and keep the warranty) without exceeding the temperature range like you can with 304 stainless.
• V-Band Up-Pipe Connection. Why V-Band? Fast, easy, no gasket, no leaks, perfectly concentric alignment of tubes for no disruption of flow.
• Up-Pipe included. This header was designed as a complete system. Using other up-pipes may compromise performance.
• Weighs only 16 pounds (vs. OEM weighs 25 pounds)
• Works with OEM EJ25 Oil Pans, and Killer B Motorsport Performance Aluminum Oil Pan!
• 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!
Swain Tech Coating available as an option. This is the ONLY coating we recommend due to its thermal capability, ability to protect the base material and durability.
OEM gaskets available
