Hello folks. I am having a debate with a co-worker as to whether or not the square-ish Denso coils with the part number 12558948 are found on all LS1's or just earlier ones. I have a pic of an '04 GTO in front of me with the coils I've described. I also called a dealer and he said that these coils are used from '97-'04. My associate is still not satisfied so I thought I would ask the experts...LS1 owners.

Has anyone found any of the other coils (i.e. the truck ones that take a bracket or the long round c6 ones) on an LS1 stock?

Thanks

 

you guys must be pretty damn bored at work...

ttt for you.

 

What is with the coil stuff today?

 

hahaha, nothin' like standing by the water cooler, wasting time, talking about cars...and getting paid.

Whats on your valve covers people

Bump..

p.s. Orangepeel, awesome pic. I'm doing that to my GF's Schnauzer before she gets home

 

The funny part is my wife's cat looks like this one...sorta.

 

yeah im really confused on what the difference between the square ones and the round ones is and which is better.

 

I dont know either except that some folks use the truck coils (the ones with the heatsink on the back) as they are 'stronger.' And according to an E-bay ad the round Delphi C6 coils can be bolted onto '99+ valve covers..