Check out my list of site sponsers. They'll be able to give you a quote. All I can give ya is part information, and then contact information for my distributors and dealers.
Please give us a call at Blackclouddiesel 715-824-5051 or you can go directly to our stack webpage for more information. Here is the link on our site to the Grand Rock Stackshttp://www.blackclouddiesel.com/Stacks/stacks.htm
We will be happy to help anytime