As far as I'm aware the 1401 and 1411 trucks were/are designed and developed by the team in Merthyr. They use the best components available on the market and go through a huge amount of testing. I think this means they can be called Premium.
Tier 5 will be required in 2019/20 depending on engine power. Maybe Exalt will have updated their website, and delivered some trucks by then?
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