what you need to do to make sure it doesnt crack or any manifold for the matter is make sure the exhaust system is properlly supported around the back of the gearbox this is one of the main causes of manifolds cracking.. exhausts only having mounts at the back.. rest of the system hanging off the turbo and manifold im quite suprised tho.. 1100 for the manifold and you chose the stainless one over a 6boost mani?