60degree V6 store Valve Spring Question

[john_V63400]

Are the comp cam 26986 valve springs a direct replacement to your stock springs. These are the springs sold at 60 degree store.
I know the LS6 and LS1 springs arent.
I really dont want to do any modifications to make new springss fit. Thats why Im asking.

[SappySE107]

They drop right in with no modifications. I would use the comp retainers and keepers as well for the best possible fit but stock retainers and keepers will work as well.

[SappySE107]

Stock on the left, comp 26986 on the right.

[john_V63400]

And also are these valve springs stronger than the stock ones
Will they reduced valve float?
How do they compare to the LS1 & LS6 springs.

[SappySE107]

I had them tested at 115# @ 1.7 and 186# @1.3. That puts them between the LS1 and LS6 spring that were tested. They are a better design than stock as well, although still beehive shape, the oval wire helps even more with harmonics.

[torq455]

did comp make different springs? i have one (no part #) 1.7 is 122 and 1.3 is 280.