This is the Idle Needle Valve for the HPI Nitro Star S-25.
This mounts into the carb and controls the flow of fuel to the engine.
FEATURES: Brass Construction
Gold in Color
Threaded and Two O-Rings Pre-Installed
INCLUDES: One Low Speed Idle Needle for the HPI Nitro Star S-25
REQUIRES: Assembly onto Vehicle
SPECS: Length: 1.5" (38mm)
Diameter of Needle: .061" (1.5mm)