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Audi 2003 A8 - Page 26

Audi 2003 A8
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26
Engine, Mechanics
V8 5V 3.7 l/4.2 l engine
The 3.7 l and 4.2 l V8 engines were adopted
from the predecessor model with certain
modifications.
These modifications relate to the intake and
exhaust systems and are described in the
following.
Design and operation are described in
SSP 217.
Variable-intake manifold in 4.2 l engine
This takes the form of a 2-stage variable-intake
manifold made of a die-cast magnesium alloy,
bonded and bolted together in four sections.
The two-stage design permits the use of two
intake paths with large cross section.
The intake manifold must be replaced as
a complete unit when performing
repairs.
SSP282_013

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