Maradyne 2-Outlet Heater Core Replacement (9" x 5.5")Restore dependable cabin heat with this replacement heater core designed specifically for Maradyne two vent 2 outlet heater systems. Built as a direct fit core for Maradyne models only, it features a compact, high efficiency fin and tube heat exchanger design to help transfer heat quickly and consistently. Ideal for replacing a leaking, clogged, or underperforming heater core so your heater can return to proper output. Application: Maradyne models