1-1/4 OD x 1 ID Steel V/C Breather Grommets 2p

The 1-1/4 OD x 1 ID Steel V/C Breather Grommets are essential crankcase ventilation components designed for serious engine builders and performance mechanics who demand reliability in critical breather systems. Sold as a pair, these steel grommets serve as mounting insulators and sealing elements in forced ventilation setups, preventing oil carryover while isolating breather lines from engine vibration. Whether you're tuning a street engine or building a high-horsepower platform, proper breather grommet specification directly impacts PCV system efficiency and prevents vacuum leaks that compromise air-fuel ratio stability.

Constructed from hardened steel, these grommets feature a 1-1/4 inch outer diameter with a 1 inch inner diameter bore, providing a precision fit for standard braided hose and hard-line combinations common in V/C (valve cover) breathing systems. The steel construction resists oil saturation and thermal degradation far better than rubber alternatives, maintaining dimensional stability across wide temperature ranges typical of forced induction and modified engines. The grommet design creates a vibration-dampening interface between the breather line and mounting boss, reducing noise transmission and preventing fatigue failure at connection points where hose stress concentrates.

Mechanics working on LS, big-block Chevy, and traditional carbureted platforms benefit most from these grommets when retrofitting catch-can systems or upgrading factory PCV arrangements. Installation is straightforward—simply press or tap the grommet into your valve cover breather boss, then route your hose through the 1 inch bore opening. Two grommets per set allow for dual-valve-cover breathing systems or provide a spare for future builds; their compact 3.9 x 0.7 x 5.9 inch footprint stores easily in any shop drawer.