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May 14, 2020 - 03:01 AM
The 521448-4 base plate is an EZ4 model and it requires a crossbar style tow bar. The sterling would work with the 521448-4.
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May 14, 2020 - 03:01 AM
View all Roadmaster 576 Sterling All Terrain 6 Wire Tow Bar - 8000 lbs Capacity Questions & Answers
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