I bought my FD about a month and a half ago and last week my clutch started slipping on me. I'm most likely going with a ACT ZX3-HDSS that take up to 400 ft/lbs or the ZX3-XTSS that takes up to 450 ft/lbs as was recommend to me when I contacted ACT. But they wanted to know what my estimated torque would be. My FD is completely stock at the moment but I have plans to modify it with time. I look at the dyno section and people pushing around 400 horsepower had a very similar torque number. 400 is where I would like to be one day. So should I get the HDSS or the XTSS.
Thanks

 

Most clutch companies underrate their pressure plates. It may say that it holds 400ft/lbs but im sure it holds slightly more than that. Probably about 10%-15% more.
If your worried about it, take ACT's suggestion and get the kit thats rated higher.
The pedal feel shouldnt be much different between the 2.
From what Ive seen, its only about a $30 difference.