High torque water proof servo/Futaba J Connector/Metal Output Gear.
The SFL-11MGWP is a waterproof version of the SFL-11MG, the 1/5th scale large-size servo for the Baja line up of cars.
This servo has a surprising amount of power available: nearly 25kg-cm at 6 volts, making it ideal for single-servo control of the Baja buggy and truck front wheels!
Note: this servo requires a 25-tooth servo horn/arm (#87280 is included), which may be different than the servo you are replacing in your HPI kit.

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About Dean: I am one of the Lead Contributors for RC Driver Magazine. Like Greg, my first hobby grade vehicle was a Tamiya Falcon; I began racing an RC10 shortly thereafter and have been hooked ever since. My garage of vehicles includes everything from a Losi 5ive-T and HPI Super 5SC Flux, to a Losi Micro T and almost everything in between including boats. I also help out at R/C Madness (my home away from home) in Enfield, CT, in my spare time. While I don’t race all that often anymore my Nephew, Doc, is starting to race my fleet of vehicles.