These beautifully machined Rocker Box Oil Pressure Gauge Adapter Fittings allow you to mount an oil pressure gauge right off your rocker box so you can be sure your motor has the proper top end pressure you need. Cheap insurance for those older motors! Available in chrome or brass finish, fits 1971 - Up Harley-Davidson Shovelhead, 1971 - 1985 Sportster models. Made in Ohio, USA. Check out the Oil Pressure Gauges and Mounts category for gauges and fittings to go along with this adapter.