Invidia Q300 Catback Exhaust Civic Si Coupe (2012-2014) Honda 50% vent system that retains

50% vent system that retains the return tube

6061 Billet Aluminum construction

Spring Rate: F 229lb/in R 196 lb/in

and has properties to retain more spring stroke

without producing harsh or overly loud overtones during regular driving

Invidia Q300 Catback Exhaust Civic Si Coupe (2012-2014) Honda 50% vent system that retainsThe Invidia Q300 catback exhaust system for the Honda Civic Si sounds as good as it looks. The Q300 features mandrel bent 70mm stainless steel piping and a free flowing oval style sport muffler to provide better exhaust flow for improved performance. Bolting up a Q300 to your K20 will allow your Si's sonorous exhaust note to come through loud and clear when you want it to, without producing harsh or overly loud overtones; the perfect choice for those