The joint 8th Drag Prediction Workshop (DPW-8) and 4th Aeroelastic Prediction Workshop (AEPW-4) evaluate computational aeroelastic analysis and drag predictions for aircraft. The initiative promotes collaboration between aerodynamics and aeroelasticity communities, focusing on enhancing simulation methodologies based on the Common Research Model (CRM), a benchmark aircraft supported by extensive experimental and finite element data. The ITA-Embraer team is developing a fluid-structure interaction (FSI) framework using SU2 as the computational fluid dynamics (CFD) solver and MSC Nastran for the finite element method (FEM) solver. A major challenge in this process is the high computational cost due to the fine structural mesh provided by NASA, which increases simulation time during iterative FSI coupling cycles. To address this, a coarser FEM mesh was proposed and validated through detailed comparisons with the original high-fidelity model. Results demonstrated strong agreement in natural frequencies and mode shapes, confirming that the reduced mesh preserves essential structural dynamics and statics characteristics. Additionally, the FEA runtime was reduced by approximately 60%, significantly improving computational efficiency without compromising result quality.