- 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
- Estimated 10-15 hp/tq gains
- Includes all gaskets & hardware
- 1 year warranty
Fitment:
2006-2011 Honda Civic Si (only)
FA5 - FG2 Chassis
K20Z3 Motor and K24 Swaps