The 646258 Tee is an OEM Continental aircraft engine fitting used in magneto air reference (or related engine pneumatic reference) systems. It functions as a three-way junction that splits or combines air reference lines within the engine’s ignition or induction reference system, ensuring correct pressure routing for stable magneto timing and engine performance.

This component is commonly found in Continental piston engine configurations where precise air reference signals are required for ignition system synchronization and stable engine operation.

Reference listings confirm it as a Continental “Mag Air Ref Tee” used in certified aircraft engine assemblies. (Aircraft Spruce, ApexShop listing)

Key features include:

Genuine Continental OEM tee fitting
Precision-machined metal construction for tight system sealing
Three-port junction for air reference or pneumatic line routing
Used in magneto air reference systems (engine-specific configuration)
Ensures stable pressure distribution for ignition timing accuracy
Designed for vibration and temperature extremes in aircraft engines
Corrosion-resistant aviation-grade material
Compatible with Continental piston engine induction/ignition reference systems (IPC-dependent)
FAA-approved aircraft engine system component
Used in certified Continental engine maintenance and overhaul procedures