Medium Front Engine Bus
1981–1989
Medium Rear Engine Bus
NPR
1987–1999, 2006–2010, 2016–2024, 2027
NPR-HD
2016–2027
NPR/NPR-HD
2000–2005, 2009–2021, 2025–2027
NPR-XD
NQR
1999–2004, 2016–2027
NQR/NRR
2005–2015
NRR
1989–1994, 2016–2027
REACH
2016–2019
