Built FA20DIT doing 830Whp, catless of course and I couldn't find an exhaust that would quiet the car down. i figured the ETS quiet would work, but no it just vibrated and didnt do much. Found this HKS legamax with the double resonator (FAs are notoriously raspy). I can cold start the car without waking the neighbors. i can have a conversation in the car and not have to yell. This exhuast is quiet if thats what youre after. the resonator setup works wonders.

Installed on my 21 STI, I wanted a deeper tone over loud, exactly what I was hopeing for. Very Easy install, and funner for me to drive. . No regreats on this purchace.

Just installed on my 2018 STI, everything needed for the install was included, exhaust looks, and fits great. Install was very easy, only took me about 20 min. Overall the exhaust is quiet as stock at idle, with the sound level picking up to about 10 DB louder around 1200 rpm and maintains that slightly louder tone throughout the rev range.