'06-'11 Civic Si Alpha Series Header Skunk2 Part# 412-05-1930 Part Number Fits: 2006 - 2011 Honda Civic Coupe (Si) 2007 - 2011 Honda Civic Sedan (Si) Note: Complement with a genuine Skunk2 MegaPower R Exhaust system for maximum exhaust flow and gain. Race applications only - eliminates catalytic converter. Includes adapter flange, gasket, and mounting bracket. O2 sensor bung thread pitch: M18 x 1.5. *Not compatible with K24 bottom-end swap* Call or text 509-987-5514 for more info. Year , make and model?
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