Fits: All valve covers with 1.22 holes; Meets rule requirement for cars running 7.99 E.T. and quicker; Threaded tube with collar mounts from inside valve cover through 1.22 opening breather screws into the tube for secure attachment; Viton gasket resists oil, alcohol and race fuel to form airtight seal; Jam nuts allow breather to be positioned to suit plumbing requirements; Internal stainless steel baffling keeps oil/air separated; Clear finish resists rust; Includes all mounting hardware one per pack