OER C1A Features:

OER offers this convenient set to replace your heater hoses. Each set includes the correct 3/4" and 5/8" diameter hoses. For the ultimate in show car appearance we recommend heater hoses that include the GM markings. Get additional points and maintain originality. Note: The 5/8" hose does not have any GM markings, but the 3/4" does. The 5/8" hose was never originally stamped by GM. Note: The 5/8" hose does not have any GM markings, but the 3/4" does. The 5/8" hose was never originally stamped by GM. Note: