1966-1977 Early Bronco Coyote Air Box Set For Gen 3 or 4 - Four Inch Tube

This air box upgrades the air intake for Gen 3 or 4 Coyote engines, enhancing airflow and performance.

• The description claims the modification improves throttle response, increases horsepower, and improves fuel efficiency.
• The description claims the system requires no engine tuning.
• The description claims the upgraded 4-inch tube requires more space than the original 3.5-inch design.