Saab 9.3 (->2003), Audi, Seat speaker adapter (165 mm). 271320-20

Audi A3 (2003->), A4 (2001->), Saab 9-3 speaker adapter (165 mm). 
20.467/K, ACV 271320-20 

Audi A3, 8P, 8PA (2003-2012) - door front,
Audi A4, B6, 8E (2000-2004) - door front, door rear,
Audi A4, B7, 8E Facelift (2004-2008) - door front, door rear,
Audi R8, 42 (2006-2015)

Lamborghini Gallardo (2003-2013) - door front, 

Saab 9.3 (1998-2003) - door front, 

Seat Exeo (2009-2013)... 

Technical information:
Speaker: 165 mm.
Panel cut out: 147 mm.
Outer diameter: 172, 50 mm. 
Ring height: 43,50 mm.