Exhaust› Headers, Manifolds and Components

Killer B Motorsport

Killer B Equal Length 4-1 Holy Header EJ Series

$1,985.00

SKU: K005 HH4-1

In Stock
In Stock
Ships by Jun 7
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

This equal-length header is designed to increase exhaust flow and optimize turbocharger performance, resulting in faster spool time and improved response throughout the RPM band. It features a thick-walled cast 347 stainless collector, short equal-length primaries, symmetrical primary design, smooth mandrel bends, and 321 stainless steel construction for durability in high-temperature turbocharged applications. It also includes a V-band up-pipe connection for easy installation and is Swain Coated to reduce engine bay temperatures and protect against heat soak.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandKiller B Motorsport
Part NumberK005 HH4-1

Videos

WRX STI Revving Sound Killer B Equal Length Holy Header

WRX STI Revving Sound Killer B Equal Length Holy Header
THE STI GETS KILLER B HOLY HEADERS + UP-PIPE! (ELH BABY!) #Subaru #WRXSTI

THE STI GETS KILLER B HOLY HEADERS + UP-PIPE! (ELH BABY!) #Subaru #WRXSTI
Killer B Equal Length Header on Subaru WRX STI (GR)

Killer B Equal Length Header on Subaru WRX STI (GR)
Subaru Sti AWE Touring w/ Killer B Header vs OEM Header

Subaru Sti AWE Touring w/ Killer B Header vs OEM Header
My Subaru STi is now FBO! | Killer b Headers | Grimmspeed Up pipe | Turbosmart EWG install!

My Subaru STi is now FBO! | Killer b Headers | Grimmspeed Up pipe | Turbosmart EWG install!
2012 STi with killer B Motorsport Header & Invidia Cat-Back

2012 STi with killer B Motorsport Header & Invidia Cat-Back
Installing Killer B Headers- The HOLIEST of Headers

Installing Killer B Headers- The HOLIEST of Headers

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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