Thermostat Housings

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Wehrli 17-19 L5P Duramax Billet Anodized Transmission Cooler Thermostat Bypass Plug - Bull Strap

Wehrli 17-19 L5P Duramax Billet Anodized Transmission Coo...

$76.60
As a direct replacement for the failure prone OEM thermostat, the Transmission Cooler Thermostat Bypass Plug can drop fluid temperature from 15-50 degrees F by reducing fluid flow restriction to...
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Fleece Performance 98.5-07 Dodge 2500/3500 Cummins Replac...

$149.38
Fleece Performance 98.5-07 Dodge 2500/3500 Cummins Replacement Thermostat Housing w/Aux Port