HI i have a 2001 Silverado HD 4x4 with the 8.1 and Allison tranny I was wondering you folks suggest the ACDELCO 101 plugs from what i see in the truck forums they all suggest the 993 now that they stopped making the 992 ACdelco plugs, i just purchased your SPW8100 - UltraPower 8.1L Magnum Spark Plug Wires, ....so why do you suggest the acdelco 101. is there much difference?...thank you so much. ( Darrel, 04/15/2018 )

The 41-101 is the best suitable iridium spark plug to replace the 41-993 platinum. We have been using the 41-101 for many years now with no issues.

I'm getting ready to install these wires. What would the plug gap for AC Delco 41-101 be? I've read 45 as well as 60.

Thanks ( Jack Blacklock, 02/24/2018 )

The 41-101 come pre gapped at .060. You can adjust them to .045 for a little better performance but it is not required.

How hard are these to change on a Motor Home? What type of connection is on the opposite end of the spark plug end?

( Jim Smola, 01/08/2016 )

Jim,

We have found that it is easiest to change the spark plug wires from inside the wheel well. Just turn the wheel the direction you are working on to full stop so you can get in there and once completed with the one side do the same on the other. The other end of the spark plug wire (the coil side) is just a push on fitting like the spark plug end.

What do I do if one of these wires ever has a failure?

( Lyle, 03/14/2015 )

You would just call us, we will give you a RMA number for the wire for you to send back and we will send one out right away at no charge.