The Definitive Guide to Porsche 996 series 911: Don't buy your Porsche without it - Everything you need to know about 996 series 911, Neal, Grant, eBook - Amazon.com
Porsche 996 GT3 RSR vs RS in Action at Nürburgring! - LOUD N/A Flat-Six Engine Sound! - YouTube
Porsche 996 GT3 RSR group N-GT (2004) - Racing Cars