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O.S. P4 Turbo Super Hot Off-road Glow Plug (OSMG2697)
Designed for .21VZ-B & 21XZ-B V-Spec and Speed Tuned Engines
For use with 25-40% Nitro Fuel.
Increases RPM's and Fuel Mileage.
Also fits Bullitt B-218, Arrow-Racing GTR-21, and most .19-.28 engine brands.
Made in Japan