I've had the Truck Tire 507 system for about a year and was told the metal stems were advised to avoid leaks. I think over time the centrifugal force on the rubber stems will cause problems. Les Schwab installed my 4 metal stems for $60 which was a good deal considering the metal stems cost about $8 each.
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2013 Crusader 290RLT
2018 Silverado 2500HD 6.6L Diesel
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