Pre Filter

This high-quality replacement pre filter (SKU ST0164) is designed to provide reliable engine protection for your outdoor power equipment. Manufactured to OEM specifications (STIHL 4123 124 0800), this felt pre filter measures 2-3/8” (60mm) L x 2” (51mm) W x 3/16” (5mm) H and ensures optimal airflow while trapping debris. A durable and cost-effective alternative to the original part, it helps extend the life of your main air filter and engine.

• Premium felt construction for effective particle filtration and long service life.
• Direct replacement for OEM STIHL 4123 124 0800 – no modifications required.
• Compact design (60mm x 51mm x 5mm) fits snugly in the filter housing.

• STIHL FS 66
• STIHL FS 86
• STIHL FS 55

Pre Filters – Essential engine protection components for brushcutters and trimmers, designed to trap fine dust and debris before they reach the main air filter.