We used the pressure pro for years and they served us well .We have been using the TST 507 NON flow through since 2013 and they work great .We rarely need to add air to the G614s on the Montana and the Goodyear wranglers on the truck. Being very lazy I would go with the flow through if I had it to do over again. With the TPMS it is so easy to check tire PSI. We are leaving on a road trip in a few days and today I went out fired up the TST and waited for the psi on all tires to read out .How easy can it get. We do not need a repeater on the TST or on the pressure pro .We do keep the antenna above the dashboard. The TPMS is a good investment considering the damage a failed tire will cause.
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