4cyl cars can have a maximum displacement of 2.5L, and may have a turbo.
All other engines can have a maximum displacement of 5.0L, and must be N/A.
The rest of the rules apply for both 2.5L and 5.0L cars:
No carbon fiber, titanium, or magnesium (Except for rims)
Under 50 Loudness
No emissions limit, but car must have a catalytic converter installed
Must use 95 RON fuel
Maximum 400 HP
No engine stress, no valve float, no engine knocking.
All sliders set to zero
Minimum Safety Rating of 35
No modded bodies
No V16s
No editing any files. Car should go directly from Automation to BeamNG with no changes.
1 car per competitor.
Car should look either like a production car, or a production car that has been modified for street racing. No using "racecar like" bodies like the one below, and no numbers.
<----Don't use this
If you want inspiration, or don't know what a "street racing modified" car would look like, here's an album that may help you. Cars must still maintain some sense of realism (a normal amount of mirrors, brake lights, etc.)
In contrast, your car is also allowed to look like a completely normal production car. Huge wings, black hoods, and bright neon colors are not required.
Tracks will vary greatly. Street Courses, Highway Drags, Cross City Races (Like a mini cannonball run, kinda), maybe some form of touge racing perhaps, and more.
which catalytic converter is required? i would vote high flow three way as thats the most likely for a modern tuner car but i just want to make sure
*edit*
also have you got rid of the pushrod restriction on the non turbo engines?