Guaranteed to enhance the performance of any engine!

• Made in the USA
• The only plugs you can buy with exotic platinum-rhodium alloy coils.
• Thunderbolt elements glow hotter, start engines faster
• Best idle performance of any brand of glow plug
• Best transition to full throttle
• Best plug life of any brand
• Coils are welded to the plug body fro greatest dependability
• Coils are triple checked for continuity and integrity
• Solid machined idle bars are welded on and will not come off
• Space age insulator ring surrounds center electrode further sealing against leaks
• Copper compression washer seals against any possible leaks past the precision-cut threads
• Electroless nickel plating or black anodized finish on plug exterior prevent rust, giving long lasting luster