Killer B Motorsport 4-1 Holy Header Coated- Subaru EJ Models (inc. 2002-2014 WRX / 2004+ STI)
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Killer B Motorsport 4-1 Holy Header Coated- Subaru EJ Models (inc. 2002-2014 WRX / 2004+ STI)

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Killer B Motorsport 4-1 Holy Header Coated- Subaru EJ Models (inc. 2002-2014 WRX / 2004+ STI)


If you want some of the best components available when modifying your vehicle, then you will be satisfied with a great product from Killer B Motorsports. This introduction is for the 321 Stainless Holy Header that will be Swain Coated for extra protection against heat and corrosion. This is a great option because the header is designed around the oil pan, and it will help reduce your oil temperatures for improved performance.

Killer B Motorsport manufactured these exhaust manifold using the latest technologies which include state of the art CAD software and simulations to help determine optimal design to develop as much power as possible out of a header design. This means that you will get more horsepower and torque throughout the entire RPM range. Additionally, this header has been designed with short as possible primaries with a single secondary which helps significantly decreases header volume allowing exhaust gas pressures to build quickly.

The symmetrical 4-1 design maintains high and consistent exhaust velocity as RPMs rise which reduces turbo lag and improves throttle response. The more noticeable gains are the ability to hold more power higher into the revs. And like all Killer B Motorsport exhaust components, one of their greater attributes is the quality of the welds. You don't have to second-guess the quality of the quality of their welds as they put forth much emphasis on the quality of the materials they use when developing their products.

This particular header will come provided with an up-pipe that will attach v-band style to the header, and will work with standard issued turbochargers or aftermarket turbochargers with an OEM like hotside flange.

Note: May not fit some Forester, Outback, and Legacy models with the OEM oil pan and cooler.

*Pictures used for marketing purposes only, actual products may vary
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Returns Policy

Returns may be accepted within 14 days of purchase pending Return Merchandise Authorization (RMA). No returns or cancellations on special order items. All returns will be charged a 20% restocking fee, no exceptions.

To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging. Item must be able to be resold as new. Several types of goods are exempt from being returned. Hazardous materials, fluids, greases, chemicals, and clothing are not able to return.

Free shipping is available within the lower 48 states for most orders totaling $199 or more. A free shipping option will be available during checkout. This offer is for delivery address in the continental United States and excludes shipments going to Alaska, Hawaii, Military Boxes, and items that require freight shipping.

Processing Time
Patterson Performance stocks a large quantity of items at any given time. Some items may require drop shipping from one of our various distributors. In stock items will ship within 1-2 business days. If you're needing your product quickly, please contact us to verify product availability before placing your order. Orders requiring additional verification (security concerns, incorrect information, etc.) may need additional processing time. Estimated shipping dates are not guaranteed and are subject to change based on inventory levels and manufacturer lead times. Backordered items are shipped immediately once available.

Items ship daily, If the item you ordered is not in stock, a member of our team will contact you via email / phone.

Patterson Performance will only ship to an address that varies from your billing address if payment is made via Paypal or a financing partner.

Patterson Performance ships from multiple warehouses throughout the United States, and sometimes from manufacturers overseas.

You can simply contact us via email / telephone for a live inventory check

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