The next details about F1's potential new engine formula for 2021 are now emerging.
Following a meeting with current and potential engine suppliers, FIA president Jean Todt revealed last week that the plan is to make the current 'power units' simpler, cheaper and louder for the future.
New F1 sporting boss Ross Brawn is also on board, declaring: "Before we think about a sustainable car concept for Formula 1, the engine must be clarified.
"Everything else depends on it."
Germany's Auto Motor und Sport has the first details, saying that the early frontrunner for the 2021 engine concept is a V6 twin-turbo producing 1200 horse power - and missing altogether is the current 'MGU-H' technology.
The report says it is also possible that the batteries and turbochargers may be standardised, with the hybrid element of the engine to simply be KERS.
Marc Surer, F1 driver turned pundit for Germany's Sky, said: "We have two problems.
"First, the FIA does not want to abandon hybrid engines. But the single-turbo removes the sound.
"The single biggest problem with F1 at the moment is the sound, and this is simply not solvable with one big turbo. We need two turbos.
"But then it becomes technically difficult to get energy from the exhaust. So the FIA may need to sacrifice the MHU-H and offer the fans a better sound."
The 2017 championship continues this weekend with the Chinese Grand Prix.
