I tried to search for downtubes, because I want to have 2.5 inch pipes right out of my stock manifolds, but it didn't work. I know I have seen a post about them somewhere. Could someone steer me please.
You can also get 2.1/4" downpipes with high flow cats from SCP that fit the stock manifolds. I have them, a bit expensive and you need to let them know if you have an EGR pipe, as the manifold offset will be different on the passenger side.