MOPAR 1949-1954 Model 503 Heater Core

HC MOPAR 49-54 Model 503

$329.00

1949-1954 Mopar heater core for Model 503 boxes that are under the hood and have curved connection on BOTH ends

Please do not confuse this with the heater core part 1233759 that fits the underdash heater core box Model 100, 104, 300, 500, 550 which has a curved and a straight connection.

We do not keep this heater core in stock & will need to fabricate it.

Our build queue varies.

Present Lead times.

Made in the USA

We make to order. Please allow adequate time for us to build.

Build time estimates [April 23, 2026]

Model Ts Brass 18 weeks

Model Ts Black 13 weeks

Model As 17 weeks

Heater cores ~11 weeks

1928-34 Ford Hot rods 2-3 weeks

Common street rods ~12-15 weeks

Tricky customs & complicated restorations ~20-25 weeks

We appreciate your patience as we continue to recruit and train new fabricators and manage the labor shortfall our country has been experiencing.