Porsche 911 GT3 RS User Handbook Manual page 24

An extremely lightweight titanium
connecting rod and lighter pistons
reduce oscillating masses, thus
ensuring dynamic engine speed
development. The inlet and exhaust
valves are actuated by especially
lightweight tappets and hydraulic
valve clearance adjustment.
This enables a maximum engine
speed of 8,500 rpm which, to-
gether with the short sporty gear
ratios, provides plenty of perfor-
mance.
Added to this is a variable intake
manifold with two resonance valves
(page 38) which work together
with the sports exhaust system to
ensure efficient cylinder charging
and high throughput rates. The
large volume of the exhaust system
supplements the low-resistance
intake manifold to improve cylinder
charging and increase perfor-
mance.
In brief, it is all about performance
– including driver performance.
We have simply provided the right
conditions for it.