i got the htss for my h22a1
it is a performance street disc, which i believe is the easiest to engage besides the ACT oem disc

and it is definitely a noticeable difference in grabbing pressure, it grabs much quicker and the car just goes when u slip it in

i can imagine the 6 puck and 4 puck must be ridiculous if the htss disc is already much stricter and its their most streetable disc

i would recommend it, as long as you get the sprung unit

looks like the ht00 and htss are both similiar street discs

~boomer