Killer B Motorsports Holy Header 2-Bolt Up Pipe 04-21 STI / 02-14 WRX / 04-13 Forester XT / 05-09 Legacy GT / 05-09 Outback XT | 2" 321 Stainless Steel | Performance Up Pipe
Overview
The Killer B Motorsports Holy Header 2-Bolt Up Pipe is a high-quality performance exhaust component designed specifically for a broad range of Subaru models including the 2004-2021 WRX STI, 2002-2014 WRX, 2004-2013 Forester XT, 2005-2009 Legacy GT, and 2005-2009 Outback XT. This up pipe replaces the restrictive factory unit with a durable, mandrel-bent 2-inch stainless steel pipe that improves exhaust flow and turbo spool characteristics. It’s ideal for Subaru enthusiasts looking to enhance turbo response and overall power potential while maintaining reliable OEM-style fitment.
Constructed from premium USA-sourced 321 stainless steel, this up pipe features 14-gauge tubing and precision CNC mandrel bends to ensure smooth exhaust gas flow and consistent fitment. The inclusion of CNC-machined stainless steel flanges at both ends guarantees true mating surfaces with the turbo exhaust housing and OEM 2-bolt exhaust manifold flange, eliminating common issues like flange warping or leaks. By removing the need for a flex joint section, this design improves durability and reliability in the demanding environment of the Subaru engine bay.
For Subaru owners, upgrading to the Killer B Holy Header 2-Bolt Up Pipe means better turbo efficiency and reduced backpressure, which translates to improved throttle response and potential power gains when paired with appropriate tuning. Its direct bolt-on compatibility across multiple Subaru turbocharged platforms makes it a practical and effective upgrade for street and track applications alike, enhancing the driving experience without compromising reliability.
Features & Specifications
This Killer B Motorsports Holy Header Up Pipe is engineered for Subaru WRX, STI, Forester XT, Legacy GT, and Outback XT models and features 2-inch diameter 321 stainless steel tubing. Constructed from 14-gauge mandrel bent stainless steel with CNC-machined flanges, it delivers enhanced durability and precise fitment for Subaru enthusiasts seeking improved turbo response and exhaust flow.
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Brand: Killer B Motorsports
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Product: Holy Header 2-Bolt Up Pipe
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Part Number: U102-2
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Fitment: 04-21 STI / 02-14 WRX / 04-13 Forester XT / 05-09 Legacy GT / 05-09 Outback XT
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Material: 321 Stainless Steel
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Finish: Natural Stainless Steel
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Construction: CNC Mandrel Bent Tubing with CNC Machined Flanges
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Origin: USA Sourced Materials
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Diameter: 2 inches
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Tube Thickness: 14-gauge
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Compatibility: OEM 2-Bolt Exhaust Manifold Flange
Key Benefits
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Performance: Improves turbo spool and reduces backpressure for enhanced throttle response and power potential.
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Durability: Made from high-grade 321 stainless steel to resist corrosion and withstand high exhaust temperatures.
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Fitment: CNC mandrel bends and flanges ensure precise, leak-free fitment with OEM turbo and manifold flanges.
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Reliability: Eliminates the flex joint section prone to leaks, increasing long-term reliability in the engine bay.
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Compatibility: Direct bolt-on for multiple Subaru turbocharged platforms, simplifying installation and upgrade paths.
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Quality: USA sourced materials and precision manufacturing uphold high standards expected by Subaru enthusiasts.
What's Included
- 1× Killer B Motorsports Holy Header 2-Bolt Up Pipe
Installation & Compatibility
Installation of the Killer B Holy Header 2-Bolt Up Pipe is generally straightforward for those with moderate mechanical experience and basic hand tools, as it is designed to directly replace the factory up pipe using the OEM 2-bolt flange. No special modifications are required, and the CNC precision fitment minimizes alignment issues. However, due to the nature of exhaust work, professional installation is recommended if you are unfamiliar with turbo exhaust components or working in tight engine bay spaces. This up pipe upgrade is compatible with the specified Subaru models and years; always verify your vehicle’s exact year and trim to ensure proper fitment. Additionally, tuning is recommended after installation to optimize performance gains and maintain safe air-fuel ratios.
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Professional Installation: Recommended
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Modifications Required: None
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Verify Compatibility: Confirm fitment for your specific year and trim level
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