Also meant to mention; on the KYB parts list I linked to, it seems to be quite a common scenario that KYB have one replacement part number for several OE part numbers (take a look at 06 - 12 Lexus IS 250 on page 126, 18 OE part numbers for one KYB replacement number)

Thanks for all of your research into this Kuro, it was a big help to me. I am going to try the KYBs. I'll post here in a couple of weeks time after I have them installed to let you know how I fare out.

I received a response from KYB this morning. They have stated "349141 will cover the rear of your application." In my email I provided them with the year of my Kizashi (2011) and they did not raise any issues regarding that. Kuro, please take a look at page 121 in the PDF link in my last m...

I also have an SLS (well really it's an SX sport) which needs new rear shocks. Balking at the high price tag of the OE 41810-57L50, I did some research on the KYB349141 and came across this official looking PDF document from KYB: http://kyb.ru/files/KYB_RHD_SA_2015.pdf On page 121 you can see that t...