I have this one. I had to mod it a bit but it may have been an IS350 one that they shipped as one of the other members said his was a direct bolt on. No big issue though. I got it installed and it stayed on at over 150 
http://www.ebay.com/itm/2008-2009-2...4play-/280505338890?item=280505338890&vxp=mtr
http://www.ebay.com/itm/2008-2009-2...4play-/280505338890?item=280505338890&vxp=mtr