Copper spark plug gaskests use to be availble, it is a old racers trick too use the copper gaskets to lower the heat rating on the spark plugs Check around to see if there still out there I use a pair of plyers and a box end wrench to hold the spark plug to tighten the tops, no more than 1/8 to 1/4 turn max You can ruin them if you try to hard Same thing on the stock gaskets, box end wrench and a pair of plyers to wrangle them off