I am wanting to get a 4000 GSK kit for my truck and I am wanting to also get the 60lb valve springs. I was looking on tst's website and I see that they sell them seperatly but they come in a set of 6. I was on another website that sells the GSK and the springs together but these come in a set of 12. The question I have is how many valve springs do I need and which kit would you go with. Here is the link to the site where they come all together. Thanks guys

http://www.puredieselpower.com/catal...ins-p-189.html

 

The set of 6 is to upgrade the exhaust springs for when running an exhaust brake. Get the set of 12.

 

Ok cool thanks Tate. I was confused and the ad didnt say anything about the difference.