This is a new, 3D printed, shaker hood drain hose nipple insert fitting for all 1970 - 1976 Firebird or Trans Am models equipped with the shaker hood. This is the OE Factory Correct bigger diameter nipple for 1970 - 1976 (1977 - 1981 has a smaller diameter nipple). This black ABS plastic drain nipple insert fits into the shaker base and has the correct ribs to connect the drain hose. Please contact for any questions or wholesale inquiries