Add MORE POWER to your FA20 Turbocharged Subaru! The factory OEM manifold is designed as a cost-effective component whereas, the Killer B Motorsport Performance Header is designed with the goal of Maximizing Exhaust Gas Performance and Increasing Power. Equal Length Twin Scroll Design improves exhaust gas scavenging, increasing the engine’s ability to make power. Available for the traditional OEM (or OEM style) turbocharger, or Dual External Wastegate version to deliver Maximum Performance Potential.
321 Stainless Steel offers benefits over common 304 Stainless Steel. 321 is made with the alloying element Titanium. This increases the material cost significantly, but for a turbocharged application, offers advantages over 304. 321 offers Increased Strength and Toughness at elevated temperatures, making it less likely to fatigue and crack. 321 was developed by the aircraft industry specifically to address longevity issues with pressurized turbocharged manifolds; addressing cracking from lower quality grades of stainless steel like 304. 321 Stainless Steel conducts less heat that 304 Stainless Steel. This means a 321 header will deliver more thermal energy to the turbocharger, improving Responsiveness and Efficiency.
Large Radius Free Flowing Mandrel Formed Bends Maximize Flow potential. Common 1D bends are easy to come by, inexpensive and provide the least performance. Advanced Design, Simulation, and Testing was used to verify maximum performance capability of our header (further verified by independent testing – BrenTuning.)
Quality and Craftsmanship come in ½” Thick Billet Precision CNC machined flanges for exceptional Durability and ground flat for Leak-Free Service. TIG welded to Aircraft Quality Standards and Ground Smooth to assure smooth Turbulent-Free Gas Flow.
Made in the USA. Every raw material used from start to finish; molten metal to finished product, is certified to have been made in the USA. We stand behind our products and include a Limited Lifetime Warranty.
1x Killer B External Wastegate Header $1149.00
2x Tial MVS Wastegates $530.00
Quality products with quick shipping doesn't get any better. The car feels great with the extra hp and the ewgs sound nasty at wot
Import imageracing very quick shipping
What a sexy piece of metal this thing is. Its light, sounds incredible. If you're going to do bolt ons you may as well add this to the list. I love shopping through IIR. They've got everything I need and my packages arrive faster then amazon prime.
Such an amazing and high quality header. IIR makes buying everything you need very simple and in fact was the first company I've seen to send updates and communicate through Facebook messenger. It makes it almost instant when talking to them rather than waiting for email responses. This header on the other hand will not disappoint you!!
Prior to having the Killer B's I had some Perrin headers. There's been a noticeable difference between the 2 - the Killer B's are slightly more throatier providing a a more aggressive sound which has been great. The wastegates are simply amazing, they're louder than your local straight piped Mustang and ALL the springs are included in the kit. Shipping was super fast I literally received everything in 2 days.