Acdelco 14251s Professional Molded Heater Hose 63981 Aazon.co: ACDelco Professional 14088S Olded Heater Hose Diesel Heater Air Intake Pipe These premium aftermarket replacement molded heater hoses are manufactured to meet your expectations for fit, form, and function. Professional™ HVAC Heater Hose - Part Number 14251S (014251S) by ACDelco. Location: Pipe-2 to Pipe-4. Length: 6.8. Size: 15/32 x 6 13/16 Has all the quality features of a regular coolant hose for interchangeable use 2005-2015 Nissan Armada Breather Hose - Genuine W0133-2769943 Less than 500 part numbers cover more than 1,200 applications to maximize coverage and reduce inventory Its diameter ranges from 1/4 in to 1 in to fit different types of vehicles ACDelco 14155S Professional Molded Heater Hose, Heater - Amazon Canada ACDelco Professional, premium aftermarket Molded Heater Hoses are specially designed, factory-molded hoses to fit today’s smaller, tighter-fitting engine compartments. Do not use for fuel or oil transfer applications. The hoses are composed of a proprietary blend of EPDM rubber, which is a superior blend of synthetic rubber that is more pliable, ensures a longer hose life, and helps resist electrochemical degradation (ECD), the leading cause of hose failure.