K&N Custom Air Filter E-3521 Sparesbox
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Originally $79.95


  • Designed to increase horsepower, improve throttle response and acceleration
  • High air flow with superior filtration performance
  • Designed to work with original equipment manufacturer vehicle electronics
  • Simple installation
  • Will NOT void your vehicles warranty
  • 0.82 lb (0.37 kg)
K&N Filters Brand at Sparesbox

Buying Guides

Available for dispatch in 1-3 business days

Product Description

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. With most vehicles you simply remove the disposable air filter and replace it with a K&N.

- Designed to boost horsepower and rate of acceleration
- Can be cleaned and used again
- High air flow with exceptional filtration
- Lasts up to 80,000km before cleaning is required depending on driving conditions
- Works with original equipment manufacturer vehicle electronics
- Will NOT void vehicle warranty
- Million Mile Limited Warranty

Product Specifications:

Air Filter Shape Oval
Base Outside Length 12 in (305 mm)
Base Outside Width 5.25 in (133 mm)
Filter Material Cotton Gauze
Filter Re-Oiling Amount 0.75 oz (22 ml)
Flanges None
Height 2.25 in (57 mm)
Inner Wire No
Inside Length 10.75 in (273 mm)
Inside Width 4 in (102 mm)
Outside Length 12 in (305 mm)
Outside Width 5.25 in (133 mm)

Additional Information

K&N Filters
Part Number
Performance Air Filters - Custom
Manufacturers warranty

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