Which coil pack do you have?

[Locobob]

Originally Posted by Karl

I have been using AC Delco oem coils for many years and will be switching to Sreamin Demon coils and MSD wires on my newly rebuilt motor.

https://performancedistributors.com/...n-demon-coils/

I had Screamin Demon coils many years ago, one failed on a track day and then some time later I noticed they were all cracking. Hope you have better luck than I did.

[Karl]

Originally Posted by Locobob

I had Screamin Demon coils many years ago, one failed on a track day and then some time later I noticed they were all cracking. Hope you have better luck than I did.

How long did you use the coil before it failed?

[Locobob]

Originally Posted by Karl

How long did you use the coil before it failed?

I'm not positive but I want to say about 4 years, it may have been less. It was a very long time ago

[XfireZ51]

Originally Posted by Karl

How long did you use the coil before it failed?

Karl,

I bought my first ZR in 2007 and replaced the original coils w MSDs. I needed to replace them this year when I realized, accidentally, that the cases were cracking. I replaced several months ago w AC Delco coils. So the original MSDS were good for quite sometime.

[garyhugo]

I also had Screamin Deamon coils on my 90 and they lasted about 3-4 years and one failed. Went back to AC Delco and that was 10 years ago.