HPI nitro buggy and truck racing, this is the R3 Medium Glow Plug.

HPI R4 Medium Cold Glow Plug for .25 size engines.

HPI nitro buggy and truck racing, this is the R5 Cold Glow Plug.

HPI nitro buggy and truck racing engines with a turbo style head, this is the R7 Turbo Medium Cold Glow Plug.

HPI nitro buggy and truck racing engines with a turbo style head, this is the R8 Turbo Cold Glow Plug.

HPI Glow Plug Igniter with AC Charger. The glow starter is used to heat a glow plug while starting an engine.