sparky

what is the hottest plug i cn get for a 4.0

XJSETH

your name is sparky and you dont know?! wow jk dude ask all these questions in one thread its not that hard or search.

sparky

my bad i will next time but anyways i have msd ignition system on my xj and it keeps burning up my plugs is there any better plugs out there that can handle a 6al msd box with a blaster 2 coil

sems

I think you are confused. If your plugs are burning or getting too hot. Your heat range is too high and you would need a cooler plug. Hotter plugs dissipate heat into the head slower than a colder heat range plug.

stuck like chuck

you beat me to it. you need to be running a step down if not two steps down from stock.

sparky

ok do you know a number for and autolite because the parts stores around here if it aint on the computer they dont know if it aint stock its not on the computer

wideout3

You could try the autolite 3923's. Or see if your local parts store can cross to another brand that runs colder

sparky

ok thanks guys