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  See all Exhaust Parts products
Killer B 2-Bolt EL 4-1 Holy Header Subaru STI | WRX | Forester | Outback | Legacy 2002-2022 - HH-2BOLT

This product is for Racing Competition only and is not legal for use in highway or street vehicles or other non-racing competition off-road vehicles.

Purchasing this product requires you to sign our Vehicle Compliance Waiver here.

The Killer B Motorsport Holy Header was developed using state of the art CAD software & simulations to determine optimal design to increase power as much as possible throughout the rev 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/boost response and the ability to hold more power higher into the revs.

Features:
  • Works with any 2-Bolt Up-Pipe, including rotated
  • Two-Bolt Reduced cost!
  • Up-Pipe not included
Fitment:
  • Subaru Sti 2020-2021
  • Subaru WRX 2002-2022
  • Subaru Forester XT 2004-2013
  • Subaru Outback XT 2004-2009
  • Subaru Legacy GT 2004-2009

Other Part Numbers:
Killer B #KILHH-2BOLT

Proposition 65

⚠ WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

Killer B Banner

Who is Killer B?

Killer B is an aftermarket company based in Waynesboro Virginia. They are known for producing parts and accessories for the automotive industry, specifically, Subaru made vehicles. The company started out in a small garage equipped with only a handful of tools, passion and enthusiasm for cars. Today, they are one of the go-to Subaru experts in the market.

Hands-On Company

The company has involved itself with various racing teams and ordinary daily drivers to understand what their customers want. By getting information directly from them, they are able to produce parts that satisfy their actual needs. Over the years, they were able to perfect their craft and become experts when it comes to the Subarus.

Quality Products

All of their products are done in-house, from design to actual manufacturing and fabrication. This allows them to have full control over their quality. and at the same time, ensure that their products come out the way they would like it to be. Designed by enthusiasts for fellow enthusiasts, you can be sure that you will only be getting the best value for your money.

Purchase Killer B Products At Vivid Racing

If you own a Subaru and are in the market for high-quality performance parts and accessories for your vehicle, then Killer B is the brand for you. Dealing with Subaru’s, they understand what it takes to improve your vehicle’s visual look and performance. To know more about Killer B, visit Vivid Racing and check out their list of products that fit your specific requirement.





All Killer B Motorsport parts have a Lifetime Warranty for the Original Purchaser. This warranty only applies to the original purchaser and is non-transferable. If the product fails it would need to be determined by Killer B Motorsport that it is due to manufacturing defects in materials or workmanship. This does not cover normal wear and tear. Improper use, modification, or abuse voids this warranty. Killer B Motorsport will not be held responsible for additional costs due to the failure of a product (cost of sale, towing, labor, etc.).

Warranty claims must be shipped back to Killer B Motorsport for review. You must call or email for return authorization prior to returning the product. For warranty evaluation please return your item to Killer B Motorsport Warranty, 1 Solution Way, Suite 201, Waynesboro, VA 22980.

Warranty claims will not be honored if the product was not purchase through an approved dealer.

Killer B Motorsport does not Warranty Wrapped Headers.
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Things
Sale price None
Wholesale price $1,646.23
Shipping Weight: 15.50
Length: 29
Width: 17
Height: 11
Product Added At Tuesday 13 December, 2016
Product Modified At Friday 11 July, 2025
Imported By ETLOverride
Last Edited By vendordata@vividracing.com
View In Admin

Emissions Info
Carb Approved No
Carb Number -
Epa Status N/A
Prop65 Unknown
Carb Required -
Vendors
Some placeholder content for the collapse component. This panel is hidden by default but revealed when the user activates the relevant trigger.
Vendor Inv Cost Retail Jobber MAP Core Updated
Premier WD $1,395.11 $1,689.00 $1,689.00 $1,689.00 ? 2025-07-11 01:51:50


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