Audi 3,7 l V6 TDI for the 24h race of Le Mans

Cosworth Formula 1 power unit 

VVL (Variable Valve Lift)

VVL system for the exhaust valves

Gassperre im 7. Gang

Through this invention, any gear arrangement in the gear set of the transmission can be converted into an H-shaped shift pattern that is familiar and comprehensible for the driver.

Source: Porsche Ag, ZF Friedrichshafen AG

Details from Ilmor 265E/500I engine cutaway

Just remembered that there were two 'underlays', timing gears and cam shaft/rocker shaft and followers, as the main drawing was getting a bit grubby. 

Two injectors per cylinder

Connecting rod and Piston of the R18 V6TDI

Subaru FB engine connecting rod

The angled cap is used to fit on small bore applications, or for cam clearance.

Angle-split connecting rods have the disadvantage that the upper part of the blind hole thread is located directly in the path of greatest stress.

スバル・モトーリモデルニ

Subaru Motori Moderni V12
5 valves per cylinder

Koenigsegg CC prototype                  

Desmodromic valve gear (Rennmotor mit Zwangssteuerung)

Ventile ohne Ventilfedern