If you own a Turbo III powered vehicle there's about a 99% chance you are aware of the fact that Lotus used a steel core plug located in the top/valley of the aluminum cast head, and you are likely aware of the issues associated with that engineering mistake.  When I was working for Chrysler as a dealer tech I can't tell you how many cracked heads we sent back to Detroit for warranty return due to this unfortunate design flaw by Lotus.  In fact, one car I was working on was on it's third cylinder head at that time (mid 90s).  
 
These RDI Performance core plugs are made from 6061 billet aluminum and will ONLY FIT the factory early/production 2.2L Turbo III Lotus heads that Chrysler installed in all production Spirit R/T's, Iroc R/T's and Phantom (Lebaron) R/T's.
 
 How can you tell which head you have?  Look on the passenger side of the head (you will have to remove the upper timing cover to expose the casting area just below the cam sprockets) and if your head says "DUNN" then these are NOT the correct core plugs for your head.
 
If your head does NOT have the word DUNN cast into it, then this is the correct set for your cylinder head.   Price is for a full set of 3 plugs (i.e.  enough to do 1 head).