I usually get between 2-1/2 to 3 years out of them, racing about a dozen times a season with a ton of street driving. I'm right on the edge of hooking with that small a tire with an 8" converter, so that's why I assume I need to fry them. If I could run a 295 or so I doubt much burnout would be needed. However I'm screwed by the lack of room under an early A-body.