General description Upgrade your vehicle's performance with the Silver Coilpack Adapter Plates Billet, designed for Golf A4, A6, TT 1.8T to 2.0TFSI. These adapters allow you to switch to the newer 2.0T/R8 coilpacks, resulting in longer coilpack life, smoother idle, increased off-boost power, and improved fuel economy. Technical specifications Material: Billet aluminum Color: Silver Package Contents: 1 x Coil assembly adapter plate set Measurement allowed error: +/- 1-3 cm Compatibility and accessories Compatible with 1.8T 20V engines in the following models: A4 1996-2001 (B5 - B5.5) A4 2002-2005 (B6) A6 1998-2004 (C5) A6 Allroad 1998-2004 (C5) TT 2000-2006 (MK1 - 8N) A3 1996-2003 (MK1 - 8L) S3 1996-2003 (MK1 - 8L) Golf 1999-2005 (MK4) GLI 1999-2005 (MK4) 1.8T 20V engines from 1998-2011 (1C - 9C - 1Y) 1.8T 20V engines from 1998-2005 (B5 - B5.5) Installation No installation guides are included. Professional installation is highly recommended. Usage These adapter plates are designed to