Chevy 1937-1938 H-78 Twinflow Heater Core
Chevy 1937-1938 H-78 Twinflow Heater Core
Chevy 1937-1938 H-78 Twinflow Heater Core
Chevy 1937-1938 H-78 Twinflow Heater Core

Chevy 1937-1938 H-78 Twinflow Heater Core

HC 37-38 H78 Twinflow

$329.00

Images of housing and support plate is for identification only.  You are buying a heater core and 12 fan pusher for the 1937-1938 Harrison two door twinflow housing.  The housing and support plate are separate items and not sold here.

If you are a purist, you will probably want your round Harrison heater core restored.  However many of you may just want your window clear of fog, your feet warm and your wife happy.  The 1937-1938 round heater cores are designed to fit the Harrison H-78 housing.  Our re-designed heater core uses a better core design and a 12V SPAL fan.  The thickness grows but we designed an interface that is not visible when installed inside the housing.

[Housing image is for illustration purposes only]

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 [February 2024]

Brass Model Ts 2 months 

Black Model Ts FT 1-3 weeks - RT is 6 weeks

Model As 2-4 weeks

Heater cores 6 weeks

Common street rods 3.75 months

Tricky customs & restorations 4-4.5 months

We appreciate your patience as we continue to recruit and train new fabricators.