Wicked CAS on Twitter: "2015 Wrx Sti Impreza magic box subwoofer enclosure stealth look sub box now available and shipping http://t.co/NWDKlZP1OL" / Twitter
We added an amplifier and subwoofer to this 2017 Subaru WRX STI! — Twelve Volt Technologies
Subaru Subwoofer - H630SCA000 | Subaru Online Parts
15+ STI WRX Upgrade | For HK Owners - OEM Audio Plus