RIDE ENGINEERING specializes in products that customize the motorcycle to optimize motorcycle performance while enhancing its appearance. All RIDE ENGINEERING motocross products have been thoroughly track tested by professional racers for performance and durability. By combining rider feedback with their engineering expertise, they produce the highest quality products available at a fair price and they do it all here in the U.S.A. Flush mount design eliminates the risk of oil loss from a punctured or cracked plastic plug. Precision machined from billet aluminum for better thread engagement. Easily removed with a U.S. quarter or a large flat blade screw driver.