Assemble the support rod but do not tighten the jam nuts. Install the turbo support rod to the tab on the exhaust manifold. Install the lower support rod end into the support-rod lower mount. The lower mount MUST SIT FLAT against the surface of the factory mount just above the weld. Adjust the support rod length until this is achieved (make sure the rod ends on both sides of the support rods have the same amount of thread showing.) With the lower mount location mocked-up, mark the hole centers where you will be drilling.