Clamp On Filter Breather W/Shield 1-1/2In Hole

The Clamp On Filter Breather W/Shield 1-1/2In Hole (RPCR9517) is a critical engine ventilation component designed for high-performance and heavy-duty applications where positive crankcase ventilation (PCV) management is essential. Built by Racing Power Co-Packaged, this half-shielded breather serves operators and technicians who demand reliable air intake filtration in demanding environments—from motorsports to industrial engine builds. The clamp-on design allows quick installation without permanent modifications, making it ideal for temporary setups, testing phases, or platforms requiring tool-free assembly.

This filter breather features a robust rubber and steel construction with a black and chrome finish, engineered to withstand vibration, thermal cycling, and corrosive environments. The 1-1/2-inch hole specification accommodates standard hose diameters commonly found in custom engine packages, while the half-shield design protects against splash and debris ingestion while maintaining airflow efficiency. The compact footprint (7.9 x 3.25 x 8.9 inches) and lightweight profile (0.56 lbs) ensure minimal installation footprint without sacrificing durability or filtration performance. The combination of elastomer and metal components provides both compliance for vibration isolation and structural integrity under pressure variations.

Operators running modified engines, racing platforms, or industrial equipment benefit most from this half-shielded design, which balances protection with unrestricted airflow—critical for maintaining consistent air-fuel ratios and preventing oil vapor carryover into intake systems. The clamp-on mechanism suits quick-change configurations and non-permanent installations where engine bay access and serviceability take priority. Verify your hose inner diameter matches the 1-1/2-inch opening before purchase; compatibility with your specific PCV routing and engine platform ensures optimal filtration and breather performance in field conditions.