BMW S65
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The BMW S65 is a naturally aspirated V8 petrol engine which was produced from 2007 to 2013. Its main use was in the BMW M3. There is no direct replacement for the S65, since the following generation of M3 switched to a turbocharged straight-six engine.
S65B40 in a E93 M3
S65 engine with the top plastic air plenum removed to reveal the 8 individual throttle bodies.
Throttle
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A throttle is a mechanism by which fluid flow is managed by constriction or obstruction.
Throttle body showing throttle position sensor. The throttle cable attaches to the curved, black portion on the left. The copper-coloured coil visible next to this returns the throttle to its idle (closed) position when the pedal is released.
Image of BMW S65 from the E92 BMW M3 showing eight individual throttle bodies
Triple butterfly throttle body atop a fuel injection plenum, on a supercharged drag racing car