SQV body, O-ring, C-ring, three-way φ6×φ4×φ6, three-way φ4×φ4×φ4, air filter, tie wrap. This is a kit containing the SQV body and accessories. When newly installed, SQV processing is required on the vehicle side.
I bought a genuine SSQV 4 since the knock-off version wasn't venting well at low rpm and light boost, however, the genuine one has the same issue. The spring itself is a little hard and so only opens at idle and wide open throttle. If there was a way to adjust the spring enough to compensate (like the first gen version), it'd be great!
The sound however is awesome!