After some research I ordered this spring 68277306AA they were $4,69 per spring. I am told these are the mopar performance spring they sell in the kit for the 5.7 and 6.4. I have not received them yet but when I do I will report on them. I plan to check the pressures etc. I am going to use this spring with the 6.4 MDS cam in the 5.7.
