Honda HR-414E/HR-417E/HR-420E engine
The Honda HR-414E, HR-417E and Honda HR-420E are a series of prototype, four-stroke 2.0-litre single-turbocharged inline-4 racing engines, developed and produced by Honda for the Super GT series and Super Formula under the Nippon Race Engine framework. The HR-420E engine is fully custom-built. Versions
HR-414E (2014–2016)
HR-417E (2017–present)
HR-420E (2020–present)

Applications
Dallara SF14
Dallara SF19
Dallara SF23
Honda NSX Concept-GT
Honda NSX-GT
Honda NSX-GT "Type S"
Honda Civic Type R-GT

See also
Toyota RI engine, similar engine also developed under the Nippon Race Engine framework
Nissan NR engine, similar engine also developed under the Nippon Race Engine framework

References

Engines by model
Gasoline engines by model
Honda engines
Four-cylinder engines
Straight-four engines
Honda in motorsport