This is the Traxxas Blue Aluminum Header for Rear Exhaust TRX 2.5, 2.5R, and 3.3 Engines on the Nitro 4-Tec, Nitro Rustler, and Nitro Slash trucks.FitsNitro 4-TecNitro RustlerNitro Slash
This is the Traxxas Replacement O-ring Header Gasket for the Traxxas 2.5, 2.5R, and 3.3 Engines. This is located on the header of the engine.
Features: Red silicone construction.
Includes: One 12.2x1mm o-ring