Never heard of them. However, another company R1 Concepts does D/S rotors for a good price and sells on ebay. I've heard a lot of good things about them and I think Herc is running a set.
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'13 Mustang 3.7V6 - MT82
'00 GP SE (L67 Swap, XP, Headers, 3.25")
'98 GTP, '01 Bonne