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Theres a DIY the other cayman/boxster website. I'll tell you right now. 4 of the 6 are easy. the 2 closest to the front of the car are a pain in the a$$!
For the base 2.7 Cayman I found two plugs listed. 1) Are these correct? 2) Anyone have a preference over one or the other? 3) Which one does the dealer use? Using "search" I really couldn't find an answer and this info isn't in the owner's manual. Thank you.
My '06 Cayman S (3.4) came with Bosch plugs from the factory, and that is what I replaced them with. I've seen NGK plugs listed alongside Bosch on parts websites, so they should be fine too.
You could ask a Porsche dealer and see which plug they recommend.
I changed my plugs when I replaced the original coils on my 06 S last year after I bought it. My suggestion is get the extended socket tool, a swivel adaptor for the socket wrench, and I actually used a 2 ft extension which gave me much more room to turn the socket handle. Once I figured out the tools to use, it took about 45 minutes to change all the plugs and coils. 3 of my 6 coils were cracked.
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