Magnum valve springs

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I may be wrong, but double check those 360 300 hp crate engine springs.
I believe those are stock springs, and your cam has .517 lift with the factory magnum rockers.....
IMO that is way too much lift for stock springs.
Again, ask others who know, but that is my understanding......
 
I may be wrong, but double check those 360 300 hp crate engine springs.
I believe those are stock springs, and your cam has .517 lift with the factory magnum rockers.....
IMO that is way too much lift for stock springs.
Again, ask others who know, but that is my understanding......
these will be for the factory EFI Durango cam only. We will be going with the Hughes versions when the cam change happens next year.
 
The 2002 Mopar Performance catalog says the service part number valve spring for both the 300hp and 380hp crate engines was part number P5249464, so it should work perfectly for a stock Durango camshaft.
The problem is the retainers. The crate motors and service heads all used different retainers than factory Magnum beehive setup. Just have jdsduster check the springs he offered are straight, not beehives, and that will verify it.
 
The 2002 Mopar Performance catalog says the service part number valve spring for both the 300hp and 380hp crate engines was part number P5249464, so it should work perfectly for a stock Durango camshaft.
The problem is the retainers. The crate motors and service heads all used different retainers than factory Magnum beehive setup. Just have jdsduster check the springs he offered are straight, not beehives, and that will verify it.
Here us what I have
20180111_092837.jpg
 
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