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Spark Plug Heat Range

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06-16-2008	#8
Pete Join Date: Dec 2003 Location: Chicagoland,IL Posts: 2,667	Re: Spark Plug Heat Range Dom,you sure you have 41-630 or 41-603. Our cars came with FR2LS (replaced by 41-602) the NGK is FR5. The only one colder is FR1LS NGK 6962/BKR6E The 41-603 is NGK FR4. Pete __________________ '91 #1635 PoloGreen 350 LT5 11.09 @ 129.27 11.04 @ 128.86 474RWHP 400RWTQ http://www.youtube.com/watch?v=SFNFOhGGlR4 http://www.youtube.com/watch?v=ZlRIOMwaDYY https://sites.google.com/site/peteszr1garage

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