B 600 Dirt is the most-raced restriction in the early Festival Playlist (the current Trail Mix Modern Rally championship runs at B). The class is dominated by Modern and Retro Rally homologation cars: short wheelbase, AWD, light enough to keep mechanical grip on rough surface transitions. Picks below are ranked for B 600 dirt builds; lower PI targets shift the ordering, see each entry's build notes.
Cars natively in B class with proven rally lineage get priority. AWD weighted over RWD given FH6's new tuning realities (rally diff is favoured even on road, and brakes now matter on rough downshifts). Power is capped low at B, so weight-to-power and chassis composure beat outright BHP. Early FH6 meta is fluid; we update each Series reset.
The cleanest B-class rally platform in the game. AWD, 1540 kg, and a 4B11T that takes a soft tune without losing PI to power, so points go to suspension, brakes and aero.
Strengths
+AWD launch off mixed surfaces
+Forgiving understeer balance
+Cheap to build, friendly to budget tunes
Weaknesses
-Heaviest of the rally picks; struggles on tight switchbacks
Build target
PI 600Race transmission + race brakes are mandatory at B. Aim for an aero balance near 0.50; rally diff over race.
Lighter than the Evo X with the same AWD launch and a stronger braking platform. The GD-chassis Impreza is a Forza staple for a reason; it transitions well under throttle on undulating dirt.
Strengths
+Snappier turn-in than the Evo X
+Strong stock brakes carry into B builds
Weaknesses
-Boxer power band is peakier; needs a closer gear ratio set
Build target
PI 600Rally tyres, race brakes, soft springs, rear-biased brake balance.
Short wheelbase plus AWD plus low weight (1310 kg) makes the GR Yaris the rotation specialist of the class. Stock PI 558 leaves the biggest tuning budget of any AWD pick.
Strengths
+Best agility on tight rally stages
+Generous PI headroom for full part upgrades
Weaknesses
-Lowest stock power; quarter-mile dirt sprints favour the heavier picks
Sits at exactly B 600 stock, so you can race it nearly untouched. Light, mechanical, and the Group A lineage still translates to good rough-road behaviour.
Strengths
+Race-ready out of the box at B 600
+Lowest mass of any AWD pick
Weaknesses
-Era-correct part list is short; less tuning flexibility than newer cars
The original Group B AWD. Heavier than the Yaris but the long-stroke five gives it standout drive out of corners; reward, not a beginner pick. Watch the new mechanical-balance display, the Quattro likes a small rearward bias for rally.
RWD and 980 kg. Off the podium for B 600 dirt because AWD wins the launch, but it is the most rewarding car on the list if you want a drive-with-the-throttle build.
Real-world specs (engine, drivetrain, power, weight) come from the Forza Wiki and manufacturer data; in-game class and PI are stock values that may shift with game updates. Rankings reflect FH6 early-meta reads and are revisited each Series reset.
More best-of lists
Modern Rally style dirt routes with rough surface transitions. New lists ship each Series reset; the index shows everything currently published.
