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The cast aluminium throttle body inlet pipe has a rather poorly designed
entry port at the point where it mates to the delivery pipe from the intercooler.
The ridge is rough and uneven with its thickness ranging from 3 to 6 mm,
which constitutes a noticeable restriction to the air flow.
The throttle body inlet pipe porting on the 1994-98 Saab 900 and 1999 9-3.
The pipe is located on top of the engine, secured by two screws with a 10 mm