These Plastic Speaker Spacers make it a breeze to replace your factory speakers.

Made from Hard plastic, with predrilled holes for you new speakers

The speaker Spacers come as a pair 

To Suit 165mm Speakers - Front, Rear & Parcel Shelf on selected Vehicles

This product is known to work in the following vehicles:

Audi A3 1997-2000
Audi A3 2000-2003
Audi A4 1996-2000 (B5)
Audi A4 1998-2001 Avant (B5)
Audi A6 1997-2001 (C5)
Audi A6 2002-2004 (C5) Facelift