"Formuła 4x4") i samochody ze zmodyfikowanym zawieszeniem, ciężarówki-enduro oraz pick-upy z wieloma modyfikacjami podwozia.
Mistrzowie w poszczególnych sezonach Sezon PRO 4WD PRO 2WD PRO Light 2009 Rick Huseman Rob MacCachren Jeff Kincaid 2010 Johnny Greaves Ricky Johnson Casey Currie 2011 Ricky Johnson Bryce Menzies Andrew Caddell 2012 Ricky Johnson Bryce Menzies Brad Lovell 2013 Johnny Greaves Bryce Menzies Keegan Kincaid 2014 Johnny Greaves C.J. Greaves Jerett Brooks 2015 C.J. Greaves C.J. Greaves Doug Mittag 2016 C.J. Greaves C.J. Greaves Kyle Hart 2017 C.J. Greaves Luke Johnson Kyle Kleiman
Tory Antelope Valley Fairgrounds (2012–2013) Bark River International Raceway (2009–2018) Buffalo Chip Powersports Complex (2014–2015) Charlotte Motor Speedway (2011–2012, 2014–2018) Chicagoland Speedway (2010–2013, 2015-2018) Crandon International Off-Road Raceway (2009–2018) Cycle Ranch (2011) Dodge City Raceway (2013) Eldora Speedway (2013) ERX Motorpark (2016) Gateway Motorsports Park (2015) Langlade County Speedway (2010) Las Vegas Motor Speedway (2009) Sunnyview Expo Center (2009–2011) Perris Auto Speedway (2009) Pikes Peak International Raceway (2011) Primm Off Road Raceway (2013–2014) Red Bud MX (2011–2013) Texas Motor Speedway (2009, 2015–2018)