sure , the #5 hot plug is what they are putting in the new p4's , if you have a standard plug toro nero you can use it . if you put the turbo comb. chamber on your p4 that it comes with than you can use the toro nero plug from your toro turbo sorry



the max m3 is a p5x , fantini tuned crank w/ 3 port sleeve . basically a n21b limited w/ 25.8mm bearing , excellent engine but i would buy a n21b for the price difference

i have made some of these w/ ceramic bearings , shaved a little off the crank and sleeve and holy smokes excellent truggy engine for 140ft. straights or less

monty