Spring rates for Nth Degree 4.5" springs?

[bluejeep]

Any chance anyone might know the free length and spring rates for these springs from AEV (Nth)?

Front spring part number: nth sprg11140b
rear: nth sprg12140b

 

[Chris]

These guys will know: http://www.boulderbars.com

They've installed more Nth systems than any other installer in the U.S.