hades1

Question regarding valve springs, how often do you change them on a DD car?
I have an '03 Z06 with 36K miles and with, as far as I know, stock valve springs (they look grey/silver).

What's a good replacement for a stock car?

grantv

Once...?
Get a set of blue GM Springs with seals, done.

foggy

Agree with grantv
Seems like a lot of failures with 2002 & 2003's
Just Put in New GM springs

I am going with the ones from BTR - Brian Tooley
Doing Springs(.560 lift capable), Ti Retainers & Seals
Mine has 115k Old man miles on it, but 2000 didn't seem to have
the spring problems like your year
Better to do it as preventative maint, than drop a valve

UstaB-GS549

Stock GM springs in 2002 were yellow. Current springs are blue.

I replaced mine with a yellow GM set about 8 years ago. I see no reason to go aftermarket. I plan on putting in a fresh set of blue springs this year.

hades1

Anyone know the color of the stock 03 z06 valve springs? Mine seem to be light grey or blue but not sure if that's stock or not.
If not, that would be great as I wouldn't need to do anything.

old stingray

wamara

Does any vendor sell both of these parts (springs and seals) as a complete kit?

fmvette9

What is suggested mileage range to change the blue springs out on an LS6 DD. I have 130K miles on my blue springs with LS6 cam. Has any one broken a blue spring with a stock LS6 cam?

JMOrem

Anyone know where to get the "Blue GM springs?"

Want to make sure I am getting the right thing lol

laurent_zo6

Contact Gene at Cultrag Performance. Forum vendor. Very helpful

http://www.cultragfactoryparts.com/contact-us

Whatsa347

https://www.briantooleyracing.com/ch...-12499224.html

Here you go