I'm looking to buy a set for my turbo set up but would like to know if there is any difference from the 4.8 to say the 6.0.. Thanks in advance

 

2 kinds,
you want the ones without heat sinks.

 

Got a picture?

 

WHY ???....I was told that the round ones (with heat-sinks) were the preferred kind for some reason

 

It is my understanding that the ones without the heat sinks are hotter coils..
(not because of the heat sinks)
If I remeber right the ones with the heat sinks are Delphi and the ones without are Mitsubishi..

 

If you go to the AC Delco website http://www.acdelco.com and go to the parts section, you will see a picture of the Delphi coil ( AC part number D585). This one has the heat sinks. Unfortunately, they do not have a picture of the Mitsubishi coil.

 

Here are pics of both.

 

I was just going to ask about this too. Thanks for the info.

 

What are the advantages of the ones without the heat sink? ( Other than the fact they are cheeper.) I went to buy one today to troubleshoot a miss and the ones with the heat sink are on my truck and they are $50 a coil. Have the heat sink coils had problems? I moved that coil to every cylinder and it still misses.

 

There is a GM TSB about #7 misfiring.