frankmarroquin

iTrader: (31)

Which ones are better? I got the Blue ones that came with my GM Hot Cam Kit. Or the Stock ones that come with an 05 LQ9?

69LT1Bird

iTrader: (1)

The ones in the Hot Cam kit are LS6 springs. Use whats in the kit. The LQ9 uses the same as a LS1, a lot weaker.

12480033 Hot Cam Kit
I: 219 I: .525 112
E: 228 E: .525
Kit includes 16 LS6 valve springs P/N 12565117 and retainers

12secSS

iTrader: (30)

Actually, around 2003 the 317 heads (LQ4 and LQ9) got the GM orange springs. These are rated at .580" lift. My 2003 LQ4 had these springs installed.

https://ls1tech.com/forums/showpost....25&postcount=2

GMCtrk

iTrader: (23)

You know now that you mention that I do remember my 02 LQ9's springs being orange.

69LT1Bird

iTrader: (1)

I am not sure what was put on your 317's but they do not have orange springs stock. PN 12589774 is the newest part number and it is used on the LS1, LS4, LQ4, LQ9, L92 and many other low lift camshaft engines. They are raw steel colored with a pink stripe.
GM put the LS6 spring is those kits for a reason, they match the lift of the camshaft. The Hot Cam only has .525 lift. Unless you want coil bind I wouldn't use the springs from the 317 heads.

Information below is from the GM Performance Parts catalog:

12589774 Valve Springs
• Beehive style springs
• Standard L76/L92 springs
• 1.800" installed height @ 90# pressure
• 1.300" @ 264# pressure
• Max lift .530"

12586484 Valve Springs • Beehive style springs
• Standard LS6/LS3 springs
• 1.800" installed height @ 90# pressure
• 1.250" @ 295# pressure
• Max lift .570"