Perfect to use with Holley LS valve covers
If you’re running the Holley LS valve covers that relocate the coil packs from that ugly bracket to directly on the v/c, these are the plug wires you want. They’re 4” shorter than the truck length ones. Keeps everything neat and tidy. No extra plug wire hanging around. I’m using them on my LM7 with the Holley LS v/c’s. Perfect fit. Not easy to get a good picture of.
Great product, works very well. Makes a big difference in the performance of my car
Parts did not fit described vehicle
Did not get to use. Bought based on my vehicle info in part search. Did not fit vehicle. Now I’m out the cost of temporary purchasing a generic set locally, only to have to upgrade to these soon from another supplier next time.
Unfortunately, our data is only as good as the manufacturer's provide and MSD lists both MD8416 and MD8406 as fitting your 1989 GMC Suburban R2500 with the 7.4L engine. We're sorry you couldn't get the universal wires to work and processed your refund as soon as we received your return.
PI is quick to ship.
Quality set of wires and pricing is right.
The service was Fan.!! Just very smooth & pleasant . Super .