Both ESM machines and the Shank entry utilize the production-based 2.8-liter Honda HR28TT V6 engine, developed for competition by HPD from the Honda "J35" series of passenger vehicle V6 engines, with improvements including twin turbochargers. Key production-based components include the block and cylinder heads, direct-injection fuel system, valve train components, drive-by-wire throttle, alternator, sensors and fasteners. The engine even utilizes a stock Honda oil filter.
Honda F1 engine is a 1.6-litre V6 with single turbocharger, paired with both kinetic and thermal energy recovery systems, as per the regulations.
looks like their street car engine program benefits big time