The 4-inch MOOSUN cold air intake pipe improves engine performance by enabling more efficient fuel combustion. It adds a pleasing sporty sound during acceleration while remaining quiet at cruising speed. Designed to match factory openings and mounting points, making installation simple. The high-performance air filter protects the engine from contaminants, is washable, and requires no oil for maintenance. Parts are made from high-quality silicone rubber, known for exceptional tear resistance and temperature tolerance up to 392°F. With a high-friction surface and no oily residue, filters and couplers remain securely in place. The steel heat shield protects incoming air from engine heat, preserving cooler, denser air for maximum efficiency.