Briggs & Stratton 805653S Cylinder Head Gasket Replaces 805653 Briggs & Stratton 805653S Genuine Briggs & Stratton Cylinder Head Gasket Used on most 18 & 20 Gross HP Vanguard V-Twin Horizontal & Vertical (2 used) Briggs & Stratton engines Replaces Old Briggs # 805653