K&N Air supply system 57i Series 57S-4900 (wet filter) OPEL ASTRA G, ASTRA H, ASTRA H CLASSIC, ASTRA H GTC, ZAFIRA A, ZAFIRA B, ZAFIRA C

For over 50 years, K&N® has been an industry-leader in automotive filtration and technology—offering products to increase performance, protection, and longevity in thousands of vehicle applications worldwide.
In addition to performance air filters, K&N® manufactures a variety of other protection and performance products, including air intake systems, oil filters, fuel filters, cabin air filters, and home air filters. Over the course of five decades, K&N® have built a reputation for exceptional quality.