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This is a Turbo Button head for RB Concept Square Strong .21 engines, such as the Econo 3-port, S5, S7II and WS7II family engines. These engines usually come with a standard plug button head, so you can use this button head to convert your engine to use Turbo glow plugs for better performance!

This product was added to our catalog on December 27, 2005.

Charles Brigance
Verified Owner
Made a huge difference on my WS7II performance better idle, Throttle response, top end I highly recomend!!!

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