The paper considers the class of Hamiltonian systems with two degrees of freedom. Based on the classical normal form. according to the rules of Born-Jordan and Weyl-MacCoy. its quantum analogs are constructed for which the eigenvalue problem is solved and approximate formulas for the energy spectrum are found. https://www.roneverhart.com/BRExhaust-2004-2006-Nissan-TITAN-5-6L-Direct-Fit-Replacement-Exhaust-System/