Seller notes

Product Description Features: Direct-fit replacement for engine. Increased airflow, enhanced Venturi effect. Improved both mid-range and top-end power gains. Runners are similar in length to the OEM RBCs but with larger bores. Special tapered and tapered plenum design that preserve mid-range power but accelerate airflow to allow for significant top-end power gains. Fitment: For 06-11 Honda Civic Si K-series engine. For 04-08 Acura TSX Base. !!! Ideal for turbocharged and naturally aspirated appl...

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