This part is from SSTU
cost:
900
mass:
1.08
category:
Engine
TechRequired:
advRocketry
engine_data:
Merlin-1B
{"isp"=>{"vac"=>302.0, "atmo"=>265.0}, "propellant_ratios"=>{"LiquidFuel"=>0.9, "Oxidizer"=>1.1}, "max_thrust"=>161.0}