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Spark plugs under boost


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Hey guys, I’m new to the forum. I recently purchased a 2012 Shelby GT500. I absolutely love the car. I’m leading a lot regarding mods. I added 67mm VMP throttlebody, 123mm JLT intake, SCT tune and a VMP pulley set with 90mm idler and a 2.6 blower pulley. 
My question is what is the best spark plug for this application......I currently have NGK TR6 gapped at .040 ....... your thoughts..... thanks all :) 

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Hi, welcome to TS! With your Stage 2 mods you're right on the money, those are the correct spark plugs. Recommend gapping between .032-.035- that's the sweet spot. Any more than that and you risk misfire. Car must be a beast! Probably about 560-575rwhp.

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