K2 Industries
06-11 Honda Civic SI FG2/FA5 Header Stainless Steel
06-11 Honda Civic SI FG2/FA5 Header Stainless Steel
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06-11 Honda Civic SI FG2/FA5 Header Stainless Steel
Stainless steel header built for the FG2/FA5 SI platform, designed to flow better than the factory cast manifold. Constructed from mandrel-bent tubing and TIG-welded for durability. Direct bolt-on fitment eliminates guesswork on install day.
Key Features
- Mandrel-bent tubing - Maintains smooth internal diameter for consistent flow and minimal turbulence
- TIG-welded joints - Stronger seams than MIG welding, resists thermal cycling stress
- Direct bolt-on design - Uses factory attachment points, no custom fabrication required
Specs
- Material: Stainless Steel
- Construction: Mandrel-bent tubing, TIG-welded
- Configuration: Direct bolt-on for FG2/FA5 platform
Whats Included
- Header assembly
Frequently Asked Questions
Do I need to replace my exhaust manifold gasket when installing this?
Yes. The factory gasket compresses during removal and won't seal properly on reinstall. Pick up a new one before you start — you'll need it to prevent exhaust leaks at the head.
Does this header come with a heat shield?
Header assembly only. Heat shielding is sold separately and depends on your engine bay layout and what components are nearby — measure your clearances before ordering.
Will I need a custom exhaust tune after installing this?
This header flows better than stock, which can affect your air-fuel ratio. If you're running a tune already, verify compatibility with your tuner. If you're staying completely stock otherwise, most drivers report no issues, but monitor your fuel trim if you have a scan tool.
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