Injen axle-back exhaust for the 2006-2011 Honda Civic Si coupe and sedan, including the 2008 MUGEN Si. Built from full 60mm mandrel-bent 304 stainless tubing with Injen's classic round JDM-style rear muffler and resonated rolled tips for a clean, aggressive note. TIG-welded and handcrafted in Pomona CA with a stainless investment-cast flange, finished with a 4.0in polished tip. Dyno-proven gains up to 5 hp and 4 lb-ft; no cutting or welding required.
Specifications
| Type | Axle-back performance exhaust |
| Material | 304 stainless steel - 60mm mandrel-bent piping |
| Muffler | Round JDM-style |
| Tips | 4.0in polished (resonated rolled) |
| Gains | Up to 5 hp / 4 lb-ft |
| Warranty | Injen Limited Lifetime |
Documents: Installation Instructions (PDF)
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2008 | Honda | Civic | MUGEN Si |
| 2006-2011 | Honda | Civic | Si |
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