ER8EHIX   Iridium plug #

ER9EHIX   Iridium plug  

ER9EH    Standard plug

Denso

IY24   Iridium plug 

IY27   Iridium plug #

The core plugs in company aircraft, #.

Please Note: We do not sell core spark plugs, these spark plugs can be purchased from Amazon or Ebay or at your local automotive dealer.   The reason why we do not sell core spark plugs, is because it is cheaper for our customers to acquire them locally.