james02Z

I know there's a billion post,read almost all,going to replace springs,my 02 z06 has 39k,,,,,better safe than sorry,,,leaning towards pac 1218,,,,then I see pac 1904 kit,dual springs with seals,retainers,keepers for about same price,,,any input on the 1904 spring would be appreciated,,,,,thanks

vettenuts

If you are stock, my first choice would be the GM springs and second the PAC. I wouldn't go to duals as you can keep your original seat/seal design valve seals.

james02Z

I have cai and borla,otherwise stock,so if I go with either of your suggestions I can just replace spring using original seal ,retainer. etc........

neutron82

yes you can reuse everything as long as you use a beehive spring... pac are great springs but duals are overkill with stock cam/valvetrain

james02Z

Thanks,,,should have done this years ago,,,,when I was young and confident!!!!!!!

Time for a C-5

PAC makes a nice spring. If you're looking at the 1218 check the 1218x; the x means it's shot peened for longevity (depending on how much you drive it). The GM blue springs are also plenty adequate for a stock cam/push rods/etc.

james02Z

Thanks for the info,,,,,39k miles over 18 years probably get away with 1218😂

Spaggs

I have an 03 Z with the same miles. I went with the GM Blue Springs and Trunion Upgrade. I have pretty much the same mods and track the car a few times a year at Road Atlanta. Just my 2 cents.

Good luck.

Spaggs

Time for a C-5

For sure. I overkilled mine with the PAC 1219x springs (mild cam) for the couple thousand miles a year I drive it.

SaberD

I would definitely go with the PAC 1218's.. These springs are well proven in racing. I got the 1215's for my ls1 when I did the rocker trunnion upgrade (which is something you should consider if you're in there already).