The K&N drop-in replacement air filter features layered, oiled cotton media engineered to increase airflow and trap contaminants for improved horsepower and engine protection. The washable, reusable element installs directly into the factory air box for an easy direct-fit replacement and is covered by K&N’s No‑Hassle Lifetime Limited Warranty. Fits Ford Sierra/ Cosworth 2.0L four‑cylinder models (1987–1993).
K&N Replacement Air Filter FORD SIERRA COSWORTH