Designed for nitro buggy and truck racing, this is the R3 medium glow plug from HPI.
Includes: Glow plug and brass spacer
Requires: Installation into the engine with a 4-way wrench
Height: 0.70 (17.8mm)
Thread size: 1/4-32
Note: HPI recommends this plug for their 12R XS engine but will work in any engine that needs a medium heat range glow plug.