Left.COUPE. M6x40. Right.COUPE. SPOILER CODE: 5J8. 6 x 40mm. A screw used to secure the Drive Belt Cover to its mounting surface. A threaded rod with a drive head (such as hex, 12 point, torx, etc.) on one end used to secure the Brake Master Cylinder to it's mounting point. A threaded rod with a drive head (such as hex, 12 point, torx, etc.) on one end used to secure the Water Pump Housing to it's mounting point. A/C Refrigerant Line Bolt. Bolt used to fasten the Engine Intake Manifold. Engine Air Intake Hose Bolt. Engine Valve Cover Bolt. Intercooler Pipe Bolt. Power Brake Booster Bolt. Secures the master cylinder reservoir to the master cylinder.