so what brand of pipes and collector did you end up using?FYI since your talking about Dorman up pipes I thought I'd put my 2 cents in. I had a leaking driver side exhaust manifold and ordered a Dorman manifold to replace it with. I broke 2 of them before I just returned the last on for my money back. They both broke in the same place, the first bolt closest to the radiator. Torque them to 45ft lbs and "crack" The problem with them is the big "China" cast into them. Save your money.