The Yonaka 3” Catback Exhaust is by far the best sounding, and one of the most affordable exhaust systems to run on a 9th gen civic si. No rasp, not too loud, and makes all the right sounds. Noticeable blowback and pops ALL THE TIME. Yonaka’s exhaust is also available for the 9th gen civic si sedan, and retains the same sound quality for both cars. I fell in love with the clean, deep sound of it and had to share this for the 9th gen community✊ *THIS IS NOT A PAID ADVERTISEMENT*. This is a serious, personal opinion on the exhaust system.

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