Introduced in 1974, Volkswagen`s water-cooled four- and six-cylinder engines have seen duty in the Rabbit, Golf, Scirroco, Jetta, Passat and Corrado. The huge aftermarket that has arisen from the wake of this quarter-century of production, proves that it`s possible to wring a surprising amount of performance from these robust engines. Published in 1987, the first edition of this book guided owners through the sea of performance modifications and aftermarket parts available for VW`s various water-cooled power plants. This updated edition includes information on the parts that have been introduced in the interim ten years, as well as the new engines, body styles and modifications now at hand. A sprawling gallery of 500 black-and-white photographs provides views of the engines, parts and modifications described.