phunk

What were you tightening that broke? The intake manifold bolts? If so, there is no point to torquing then any tighter than stock. Tighter does not make it seal better or seat down any tighter, its just more torque on the bolts, and that is it. There are steel sleeves seated in the manifold that touch down to the LIM and take all the torque load. They have a step machined in them to hold the manifold down. You would have to torque so tight that the steel sleeves deform (not going to happen) before it held the manifold any tighter than standard touch-down.

You just need to make sure the gasket is in good shape. O-ring style gasket, it should be bulging out from the flange and take some decent pressure with your finger to get it to be flush with the plastic flange. If its pre-compressed flat, it needs to be replaced, but I expect that to be very old by then. I just looked at mine with over 60K on it and its a 2009, gasket is still good to go for years to come.

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