The K&N 33-2013 Air Filter fits  Ford Sierra. 
K&N's replacement air filters are designed to increase horsepower and acceleration while providing excellent filtration.  These filters are washable and reusable and are custom designed to fit into your existing factory air box. Their drop-in design means adding performance is simple. Simply remove the disposable air filter and replace it with a K&N.
Product Specifications
Air Filter Shape
Panel
Filter Material
Cotton Gauze
Height
1.625 in (41 mm)
Outside Length
9.875 in (251 mm)
Outside Width
8.25 in (210 mm)
Package Contents
1 Air Filter
Package Quantity
1
Product Style
Panel Air Filter
Top Style
Open
Weight
1.3 lb (0.6 kg)
Filter Re-Oiling Amount
1.69 oz (50 ml)
Product Box Height
11.56 in (294 mm)
Product Box Length
10.44 in (265 mm)
Product Box Width
1.75 in (44 mm)
Inner Wire
No