I used to believe in the way more expensive 918's until they started breaking on a regular basis. I will say that the GT2-3 by spec's is stretching the limits of the LS6 springs. It is uncommon to hear of them breaking, but not unheard of. What did you have them breaking on Brian?

 

i haven't ever had any break, i'm looking to buy some.

 

Since I've been a member here, I've read more about aftermarket springs breaking (Comp 918's for sure) than anything else. I understand that certain cams have agressive ramp rates and require more seat pressure which would warrant an aftermarket spring. So far it seems that some guys have had good luck with PAC springs, but I don't know how many miles they have put on them.

I use the yellow LS6 springs for my application (very mild obviously), and also have a set of them on my WCCH stageII 317's for my LQ9 project, which I plan to use with a Vinci Stangbanger (220/224 .551/.551 114)

 

I went through one set with my GT2-3 and an old customer broke two with the same cam.