Customer didn't think the stock coolant filter was sufficient so they added their own. It's filtering coolant entering the heater core. : r/Justrolledintotheshop
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An Inline Coolant Filter Will Catch What You Don't See – Beyond the Checkered Flag
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An Inline Coolant Filter Will Catch What You Don't See – Beyond the Checkered Flag
An Inline Coolant Filter Will Catch What You Don't See – Beyond the Checkered Flag