Bilstein B6 HD front strut 35-128717

Hi. I keep getting different answers and can't seem to contact Bilstein due to weekend. But I would like to install ASAP. Here goes again.

I am installing these Bilstein B6 HD front struts. Part number 35-128717. Do they have internal bump stops or do I need to buy and install separate bump stops?

S197 (2008 GT)
Ford Lowering P springs on
Already have Bilstein B6 HD rear shocks on
Ford GT500 strut mounts will be installed too
I already bought the Bilstein B6 HD front struts

Thanks for a hopefully clear accurate answer.

Btw...not different answers from this of forum but I meant from Auto shops I talked to.

Ok. I went into Bilstein website. In case anyone is wondering, the instructions downloaded from their site indictated "internal" bump stops. So no need to put on stops. Concern solved...lol.