FOR SALE NOS mp valve springs p2946353

[blue_stocker]

New in the boxes mp p2946353 valve springs, $150 plus shipping from Calif. If interested pm me here, thanks.

 

[blue_stocker]

https://blu180.mail.live.com/att/Ge...t&blob=N3xIUElNMzQ2Ni5KUEd8aW1hZ2UvcGpwZWc_3d

 

[blue_stocker]

MP valve springs P2946353 'mystery' springs

I did some testing over the weekend, testing some various valve springs and this is what these monsters tested at...

1.89" installed ht, 160#
at .600" lift the spring tested showed 550#
that's roller cam pressures; they'd
be great for a street roller or hydraulic roller.

With the inner spring removed, here's what you have...
1.89" installed ht, 140#
.600" lift the spring still has 370#

these things are beasts! Back in the DC realm,
Chrysler claimed these were the so-called 'mystery' spring
and could be a good unit for their mushroom cams
like my favorite, '588' mini express... makes one think
about how good the original DC cams really were!

Nonetheless a great valve spring.