604 Valve springs

[Lazer-10]

How often should a 604 valve springs being changed and does anyone know the GM part number

[BPRacing29]

I change mine every 10 races or 300 laps.

GM part # is 12495494 - set of 16


BPRacing29

[Lazer-10]

Thank you

Thank you for your help on this matter

[Matt49]

300 laps give or take.
You should also just go ahead and change the caps and keys while you are in there.
GM part number 19171528 for a set of the caps and GM part number 12495503 for a set of the keys. About $30 gets them both and it's worth it just to have them on hand in case you find a problem while you are changing springs.

[sikjeep]

I was told by a good source that this years springs are crap. I dont want to change mine now.

[Matt49]

I was told by a good source that this years springs are crap. I dont want to change mine now.

The springs have always been crap. That's why a lot of people buy about 50 of them and pick the best ones out and scrap the rest just to make sure they have a reasonable set of springs.

[car23]

can u buy them individual and whats the part number?

[Egoracing]

can u buy them individual and whats the part number?

You used to be able to but the cost of 3 or 4 was more than a complete set with retainers and keepers.