HARDmotion 06-11 Honda Civic Si Race Header | 8th Civic FA5 FG2

HARDmotion 06-11 Honda Civic Si “HyperFlow” Header
The 06-11 Honda Civic Si 8th Generation Civic Race Header from HARDmotion, is a satin finished stainless header that has been heat treated and coated in a rust prevention coating to help enhance the durability and allow the header to perform for years under extreme heat from the engine. We have tested this with our Kraftwerks Supercharged shop car and the power output and overall durability have prooven itself time and time again. When many companies are ceasing production of the K-Series Headers, we are stepping it up and filling in that space. This race header is designed to enhance engine performance through optimized exhaust flow and improved exhaust gas scavenging. With all things combined you have a strong header that gives you 10-14HP and can work with or without flashpro.
Design and Construction
Compatibility: Seamlessly integrates with both OEM and aftermarket exhaust systems.
Manifold Design: Utilizes a 4-2-1 configuration, balancing optimal torque delivery at low-end RPMs with increased horsepower potential at higher RPMs. This configuration is ideal for launch performance and high-rpm racing applications.
Tubing: Mandrel-bent piping ensures smooth exhaust flow transitions, minimizing turbulence and maximizing performance.
Construction: Fabricated from TIG-welded 304 stainless steel with a satin finish. This material resists corrosion and provides exceptional durability. Additionally, the header is coated with a specialized heat-resistant and rust-preventive coating for extended longevity.
Flanges: Precision-machined CNC steel flanges ensure accurate and leak-free mating surfaces with the engine block and exhaust system.
Gaskets: Includes header gaskets and donut gasket for a complete installation solution.
Oxygen Sensor Extension: Features a built-in O2 sensor extension for compatibility with the stock ECU or Hondata FlashPro programmer. This simplifies ECU adaptation and tuning processes and reduces the chance of a check engine light.
Catalytic Converter Compatibility: Designed for easy future installation of a high-flow catalytic converter (currently in development).
Performance and Durability
Flow Optimization: Promotes enhanced high-flow air circulation, resulting in immediate horsepower and torque gains (estimated 10-15 hp/tq).
Warranty: Backed by an industry-leading 3-year warranty, exceeding typical standards in the performance parts industry.
Longevity: Constructed with high-quality materials and robust welding techniques to ensure long-term performance and reliability.
“The HARDmotion 2006-2011 Honda Civic Si race header is a meticulously engineered exhaust manifold designed to optimize engine performance, improve high-flow exhaust circulation, and enhance torque and horsepower potential.”  — HARDmotion Team
Overview:
4-2-1 race manifold configuration for balanced power delivery
Mandrel-bent tubing for smooth airflow transitions
TIG-welded 304 stainless steel construction with heat-resistant coating
CNC-machined flanges for precise fitment
Header gaskets and donut gasket included
Built-in O2 sensor extension for ECU compatibility
High-flow catalytic converter compatibility (future availability)
Estimated 10-15 hp/tq gains
Industry-leading 3-year warranty
This race header represents a reliable and effective solution for enthusiasts seeking to unlock the full potential of their 2006-2011 Honda Civic Si’s K20 engine, while not breaking the bank or having to worry about issues down the road. Bolt-on and go performance at your finger tips.
Fitment:
2006 2007 2008 2009 2010 2011 Honda Civic Si (only)FA5 – FG2 ChassisK20Z3 Motor and K24 Swaps