Invidia Header Civic Si (2006-2011) Audi Cusco's Rear End Power Brace

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Invidia Header Civic Si (2006-2011) Audi Cusco's Rear End Power BraceThe Invidia header for the Honda Civic Si is made of high quality polished stainless steel to enhance the beauty of your engine bay as well as provide a significant power gain all throughout the powerband. This Invidia piece is a 4 2 1 design to boost low end and mid range torque. A built in flex pipe prevents cracking allowing to last the life of your Civic Si. Invidia has seen power gains of 20 horsepower and 11 ft lbs of torque. FITMENT: Honda