Brother thank you for your prompt reply but can you also guide me as to what my above plugs and differences are ?
I mean the missing issue on the K16-U11 and K16R-U11. Can i install K16PR-U11 and will it solve the issue, car is fully maintained but just needs plugs. Please read my previous post and guide me as to the difference in the above mentioned plugs and then please guide me on the copper and iridium thingie ... i want to know why my car is knocking.