These racing air filters from Stage6 feature a low porosity foam for optimum filtering characteristics and are available in red, blue and yellow.

They have a fitting diameter of 35mm, which fits all 12-21mm Dellorto, and is just 7cm long, ideal for where space is limited.
Stage6 Part No. S6-350002BL, S6-35000GE, S6-350002RO

• Universal