Upgrade your vehicle's performance with the K&N 33-2025 Drop In Air Filter, designed specifically for 1988-1991 Honda Civic and CRX models. This high-flow air filter features a unique design of layered, oiled cotton media that enhances airflow while effectively capturing contaminants. By replacing your factory air filter with this K&N unit, you can expect an increase in horsepower and overall engine efficiency. The K&N Drop In Air Filter is not only easy to install in your factory air box, but it is also washable and reusable, making it a cost-effective solution for maintaining peak performance throughout your vehicle's lifespan. Backed by K&N's impressive 10-Year/Million Mile Limited Warranty, you can trust that this filter will provide exceptional engine protection and performance for years to come. Experience the difference in airflow and performance that only K&N can provide. <b>Features:</b> * High-flow design: Enhances airflow for improved engine performance: High-flow design: Enhances airflow for improved engine performance * Washable and reusable: Designed for long-lasting use and easy maintenance: Washable and reusable: Designed for long-lasting use and easy maintenance * Increased horsepower: Optimizes engine efficiency and power output: Increased horsepower: Optimizes engine efficiency and power output * Easy installation: Fits directly into factory air box without modifications: Easy installation: Fits directly into factory air box without modifications * Backed by warranty: 10-Year/Million Mile Limited Warranty for peace of mind: Backed by warranty: 10-Year/Million Mile Limited Warranty for peace of mind