Smog Tube Fitting

The TRANS-DAPT Smog Tube Fitting (MPN 2192) is a 90-degree PCV (positive crankcase ventilation) bolt-on connector engineered for automotive emission control systems. This fitting serves as a critical interface between engine crankcase breather components and air intake or catch can systems, preventing harmful blow-by gases from entering the atmosphere while maintaining proper engine pressure regulation. Law enforcement and military personnel who operate or maintain tactical vehicles benefit from reliable emission control hardware that meets both regulatory standards and field durability demands.

This 90-degree Smog Tube Fitting features a 3/4-inch inlet tube connection with bolt-on installation, eliminating the need for threaded adapters or compression fittings in confined engine bay spaces. Constructed from durable black plastic, the fitting resists corrosion and thermal cycling common in high-temperature engine compartments, while the included hardware and gasket ensure a sealed connection that prevents vacuum leaks—critical for maintaining proper air-fuel mixture and system efficiency. The compact 6.1 x 1.55 x 7.95-inch profile and 0.16-pound weight make it ideal for retrofit installations or custom breathing system builds where space and weight margins are tight.

Mechanics, engine builders, and vehicle technicians rely on this fitting for street-legal emission compliance and reliability in both stock and modified powerplant configurations. Installation is straightforward—bolt the fitting directly into existing PCV manifold ports, connect the 3/4-inch inlet tube to your catch can or air intake separator, and secure with the supplied gasket to eliminate leakage. Ensure inlet tube diameter matches the 3/4-inch specification and verify bolt pattern compatibility with your specific engine platform before purchase for optimal fitment.