|The 2554 AMG Transport Dynamics M12S Warthog CST is a civilian transport alternative to its militaristic cousin, the M12 Force Application Vehicle. What it may lack in brute force – you won’t find a turret on this version – it more than makes up for with its 720 bhp twin turbo V8, making it significantly faster than its FAV counterpart. The Warthog CST in Forza Horizon 3 is also ideally suited for the rough and tumble landscape of Australia. With the most advanced suspension in Forza Horizon 3 (with more than 70 cm of suspension travel), plus advanced dampening, you won’t find the combination of power and stability like this anywhere else in the Horizon Festival.|
— forzamotorsport.net 
The 2554 AMG Transport Dynamics M12S Warthog CST (abbreviated as M12S Warthog CST; CST standing for Civilian Sport Transport) is a civilian variant of the AMG Transport Dynamics M12 Warthog FAV from the Halo series that is featured in Forza Horizon 3.
Initially available to anyone who played either Halo: The Master Chief Collection or Halo 5: Guardians between September 6, 2016 and September 23, 2016, the M12S Warthog CST has been featured in several Forzathon events:
- The Halo Weekender (October 28 - 31, 2016)
- Who Wants Seconds? (February 3 - 6, 2017)
- Hot And Heavy Horizon (January 19 - 25, 2018)
- An upcoming, currently unnamed event (March 23 - 30, 2018)
The M12S Warthog CST is a 33% smaller, 50% faster rendition of the M12B Force Application Vehicle utilized by the United Nations Space Command, fitted with a smaller displacement 8 liter twin-turbocharged V8 instead of the military's 12 liter hydrogen-injected internal combustion engine, and a lighter curb weight of 5071 lb (2300 kg), all of which make it more approachable for civilian usage. The M12S Warthog CST has a length of 15 ft (4.7 m), a width of 7.9 ft (2.4 m), and a ride height of 22.7 in (576.6 mm). As reference, the M12B Warthog FAV has a length and width of 21 ft (6.3 m), a height/depth of 8.2 ft (2.5 m), and a weight of 6500 lb (2948 kg) or 3 metric tons, as well as a top speed of 78 mph (125 km/h).
In addition, the four-wheel steering system from the M12B has been reverted back to a normal front-wheel steering system due to technical limitations in the Forza installments' game engines, as well as the fact that four-wheel steering would actually make the M12S Warthog CST unstable at high speeds.
Its V8 produces 720 hp (537 kW) at 6,500 rpm and 855 ft·lb (1160 N·m) of torque at 3,200 rpm. The high power output of the engine, combined with an all-wheel drive system and short six-speed automatic gearbox with manual override, allow the M12S CST to accelerate from 0 - 60 mph (97 km/h) in 5 seconds and 0 - 100 mph (161 km/h) in 13.8 seconds, and reach a top speed of 119 mph (192 km/h) in just over 10 seconds. It also has a power-to-weight ratio of only 313 hp (233 kW) per tonne, owing to its curb weight of 5071 lb (2300 kg).
|Conversion - Drivetrain|
The M12S Warthog CST launches off the line with little to no wheelspin despite having a central differential with a 86% bias towards the rear. Reaching 60 mph (97 km/h) in 4.8 seconds, the M12S Warthog CST has decent acceleration but is limited by its low top speed of 119 mph (192 km/h). However, it makes up for this with sharp, responsive handling, high maneuverability, and an offroad-oriented chassis, which are traits typical of the original Halo renditions of the Warthog. The M12S Warthog CST is an offroad vehicle best suited for races that do not prioritize speed. As it also lacks the four-wheel steering from the original Halo renditions of the Warthog, the M12S Warthog CST has more stability at high speeds as well.
- In the Forzathon event Hot And Heavy Horizon, winning a race in either the M12S Warthog CST or the 2012 Porsche 911 GT2 RS unlocked the "Choices, Choices" challenge.
- M12S Civilian Sport Transport, M12 Force Application Vehicle, and M12B Force Application Vehicle on Halo Nation
- ↑ "Forza Horizon 3 Gone Gold", forzamotorsport.net
- ↑ "Heavy Metal Affliction - 2554 AMG Dynamics M12S Warthog CST", forzamotorsport.net