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Discussion Starter · #1 ·
car has 43,000 miles and want to change the plugs what are the best to go back with I have seen where some recommend using regular copper and just replace alittle more often and you have more surface area to fire at the end of the plug and if so do they run hotter or anything that could hurt the motor and what model plugs would I need?

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Re: 2005 t5 s40 plugs (marcm1)

NGK coppers are amazing, and cheap. 10 bucks for a set of 5, just change them every oil change and you're gold!

On the S70 I ran BKR7E's (now 4644's in some systems), but i'm not sure if threading or what have you is any different on the S40 engine. I would be inclined to say no, though.
 
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