i know some guys on titantalk forums run springtech shackles and rear leafs in place of mcgaughys(SP?) springs so they may make a decent spring but i dont know about shocks/struts
so i called the company they said its an OEM strut that has been gutted, usual, re-filled and using smaller valves to stiffen the strut. Sounds very similar to other after market struts out there excluding coilover systems.