Injen DCI here and I can clearly hear the turbo spool when stepping on it and can clearly hear the DV as well (much more at high RPM). I don't even have a tune yet and it sounds really great !
2008 FG2 Civic SI FBO - SOLD
2009 E92 335i Xdrive FBO - SOLD
2017 F22 230i Xdrive | Alpine White | Coral Red | M-Sport | BMS Billet Intake | Roof Rack | Daily Driven