The Briggs & Stratton Lawn Tractor Replacement Air Filter Cartridge and Pre-cleaner is an ideal replacement part for 14-18 HP Briggs & Stratton I/C, Intek OHV, and AVS engines. The cartridge’s dual-stage filtration system combines a foam pre-cleaner to capture large particles with its namesake pleated paper cartridge that enables it to trap fine dirt. This filtration can help to prevent premature wear of internal engine parts. The premium filtration materials and patented housing design provide superb protection for Briggs & Stratton engines operating under high demands.