It has what appears to be a white stripe. I know the 918's now have a blue stripe, but this one is white. Could it possibly be a blue stripe that after it has been used with hot oil on it, it turned white? Will have a pic of it tonight when I get home. Btw...it was ran on a ls6 heads cam car that made low 400's

 

PAC 1218 perhaps??

 

I have no idea man. My buddy got then from the guy that used them when he bought the heads. He is selling them to me dirt cheap cause he has an extra set, I'm just trying to figure out what they are. If I wasn't on my phone I'd post the pic

 

I'm hoping maybe someone with blue stripe 918's that has ran them awhile then changed them or something will be able to give me some insight

 

Read in another post they make be stock 04' GTO springs

 

My 1218s had no painted stripe.

 

We do not paint our springs. Someone else might have. I'm going to guess it's not ours. Post up a pick of a view from the top and bottom.