I would run a med plug an go up in nitro percent. I think 25-30 even. If u wanna run a little cooler do the 25% and a med plug. I have seen prices just go wayyyy up on plugs. I would look around i think Amain has/had med plugs no turbo i think for 3.50 or so... So med plug like we all said an i would go with a higher nitro % with that motor... take care my friend