Venttiili, pakokaasun kierrätys

OPEL ANTARA A, CASCADA, INSIGNIA A, INSIGNIA A Country Tourer, INSIGNIA A Sedan, INSIGNIA A Sports Tourer, INSIGNIA B Country Tourer, INSIGNIA B Grand Sport, INSIGNIA B Sports Tourer, ZAFIRA TOURER C VAUXHALL INSIGNIA Mk I, INSIGNIA Mk II, ZAFIRA Mk III