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Discussion Starter #1
cars popping through the exhaust at about 5400,under WOT,Ive got my old NGK TR6,their a range on the cold side for my NOS setup but was just using them to fire up the car.AFR says I need a plug with the washer on them,my ones now do not have this,any ideas what plug to run on my new set up.N/A...set up in my sig...thanks
 

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Since you are still testing, heat ranges may vary so get some good old cheap 1.99 Autolites.....I'd say start with 3924s. You can go up for a hotter plug i.e.3925, 26 etc...

These plugs have longer threads for dissapating heat with a flat seat and crush washer.
 

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Discussion Starter #3
Thats the ones Im going to buy,thanks for the reply
 
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