A cylinder head structure for a multi-cylinder internal combustion engine that is mounted on a vehicle so that a cylinder alignment direction goes along a front-rear direction of the vehicle comprises a cylinder head side wall, an upper deck, and a rib. The performance criteria and operating conditions of the part are assessed and a total stress state is determined from the sum of the residual stresses and applied stresses acting on the part. The microcable slides along the length of the lead body and extends beyond the distal end thereof. The attachment system further comprises an associated plurality of inwardly-projecting tongues mounted to the structural case. The inner perimeter of the outer portion defines a nesting region configurable with the outer perimeter of the inner portion such that said inner portion is removably insertable into said nesting region.