Invidia has just released two new exhausts for the 2012 Civic Si Sedan and Coupe. Both look amazing IMO. The Invidia Q300 Exhaust is designed for customers who want a "mild" street exhaust, with a deep sporty tone that isn't too loud. Amazingly though, the Q300 still produces great power gains...

This thread is dedicated to Invidia exhaust systems for the 9th Generation Civic Si. Please keep information/questions about this particular brand of exhaust system limited to this thread to avoid confusion on the forums and to keep it neat and tidy. Q300 Exhaust: Specs: Large...