TRD
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TRD offers this slick set of 3 different valves to change up the sound of your 2013-2020 86/BRZ/FRS. Go with the blue for a gentler noise in your cabin versus stock. The tube has a molded wall which almost cancels transmission of the normal noise. The green valve contains less foam than OEM and you’ll start to notice a louder and more raw sound. The red is the most direct and aggressive valve, creating the loudest and deepest noise. You’ll practically feel the bass-like sound from the induction system in your cabin!
Locate the OEM sound tube off the main intake tubing and install one of these valves easily in just minutes. Try experimenting with all 3 to get the level of rasp and volume you want.
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