This part is from SSTU
cost:
30000
mass:
11.405
category:
Engine
TechRequired:
heavierRocketry
engine_data:
F1
{"isp"=>{"vac"=>310.0, "atmo"=>265.0}, "propellant_ratios"=>{"LiquidFuel"=>0.9, "Oxidizer"=>1.1}, "max_thrust"=>3174.0}