This is a new HID kit from Retro Solutions. I bought this for my V6, then promptly bought a GT with factory HIDs... I test fit one bulb (it fit), but never installed the kit. This should fit most stangs without factory HIDs from 2005-2012.
The kit contains:
2x 55w ballasts
2x 6000k High/Low H13 bulbs, WITH bulb capping (a MUST for non-HID housings)
The kit runs $177 on Retro-Solutions, asking 140 plus shipping.