The coils arent readily avaliable from Holden and also are very compared to the msd coils but you might be interested in this test done by a member of the L67 forum
Hi Guys I have been doing a bit of testing with various genuine Holden coil packs. I have 3 sets of l67 coils and 3 sets of standard emotec coils and 1 set of MSD's
I have used the Holden test procedure from the diagram below.
Our results as follows..
Std Emotec Coil Packs: Gray Bottom
Low voltage side (Bottom)
0.9
0.9
0.9
0.9
0.9
0.8
0.9
0.9
0.9
High voltage side (Top)
5800
5680
5750
5800
5800
5700
5810
5800
5700
L67 Coil Packs:
Blue Bottom
Low voltage side (Bottom)
0.8
0.9
0.9
0.9
0.9
0.9
0.8
0.9
0.9
High voltage side (Top)
5640
5730
5750
5800
5800
5750
5800
5800
5750
As you can see from this the coil packs read on average exactly the same.
So against common belief there doesn't seem to be a difference between blue and white packs.
I called a friend from GMH engine assembly and production last night and he seems to think that the coil pack, DFI and mounting bracket was imported as a unit from the US plant because of the fewer numbers needed for production runs in Australia.
This would explain the different color bases and Part numbers.
The MSD coil packs findings were very different to the specifications on there web site: Go Figure..
Here's what we found using the same Holden test method as above on the MSD Coil Packs..
MSD Coil Packs: Gray Bottom
Low voltage side (Bottom)
0.8
0.8
0.8
High voltage side (Top)
5660
5640
5790