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So I'm in process of prepping my 07 9-3 Aero 2.8L for stage 0 tune from Vtune. Brian recommended the Denso Iridium IKH22's. .8mm gap. I assume running these colder heat range plugs will be safe to run stock until I get my tune job? It will probably be 2 weeks until then. Any advice?
 

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Yes, go ahead and run those plugs even if the motor is still stock. While they are one heat range colder than the OEM plugs, it’s the tighter gap that really helps prevent misfires. No brainer upgrade to any 2.8 V6.
 
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