I paid about $2.00 a piece for my TR6 plugs. They worked great. I started with the TR55, but later found out that they are the wrong heat range for a 2000. If you need an example of what happens when plugs get too hot, here you go. This is what happens when you get to much nitrous and not enought fuel.


2002 Mustang GT H&R, Bilstein, NX, K&N, Bassani, and Prochamber 03 Cobra wheels, Goodyear Eagles: 275 fronts, 315 rears 325HP and 433 ft-lbs at the wheels Old Car: 2000 SVT #463/2150 Best #'s - 268.5HP and 275.8 ft-lbs at the wheels