This sounds insaner
"If someone told you there was a rally car with a 16cylinder Yamaha engine fitted, a V16, that revved to over 14,000rpm, that was only a 2ltr, and made the most ear peircing scream you'd ever heard from an engine, you'd not believe them. But they'd be telling the truth. Seriously.
Back in 2011, this car, which in later years got a Mazda 3 rotor and then 4 rotor engine, was powered by something super insane, a 64 valve, 16cylinder V16 engine, made from 4x Yamaha Thundercat YZF600 engines (NOT Honda CBR600 engines like some BS online features say)! To make it legal for the class it was running in, which was up to 2ltr, the crank was shorter stroke than standard too, hence the 2ltr rather than 2.4 if it was 600x4.
As you can imagine, everything imaginable was custom and just insane, and yet another of the wild creations of French legend Vincent Foucart.
Before this the car had a custom W12 engine too, but that's another story.
This engine revved to 14,000rpm+ and made over 400 horsepower from the screaming 2ltr, and as the video shows, it really screamed like no other engine."