Bolt i/d  5,18 mm - 97-up - black- seal can be red or black - no support - Opel Vectra, Volvo S70, Saab - if the bolt hole will be drilled to 8.1 mm this filter might be interchangeable with A 60 27 OF099 5551 and can be used also for AW 55 50 (no warranty) - this filter is very similar to some other products which cannot be used for this application - please ask for our product-info-flyer (IDS AW55-50SN/51SN-50-40/42/LE/LM-OF) for correct identification - major differences to similar filters are the 5,18 mm bolt-hole, the non rectangular contour of the filter body with no support