As it says, in the change from 2.4.0-r2 to 2.4.1-r1 and beyond, the gt.blockcasings4.13.name 1163:13 has been replaced by an Engine Intake Casing in this recipe. Perhaps more of a concern is that the Engine Intake Casing can be crafted by the recipe for the gt.blockcasings as opposed to the GT recipe. It too has the NDT of 1163:13. Please see the screenshots and let me know if you need any more details.
As it says, in the change from 2.4.0-r2 to 2.4.1-r1 and beyond, the gt.blockcasings4.13.name 1163:13 has been replaced by an Engine Intake Casing in this recipe. Perhaps more of a concern is that the Engine Intake Casing can be crafted by the recipe for the gt.blockcasings as opposed to the GT recipe. It too has the NDT of 1163:13. Please see the screenshots and let me know if you need any more details.