These dipstick assemblies are made of stainless steel hose so they will flex around header tubes, frames and mounts. They use an o-ring seal top and bottom to positively seal against water and dirt. Will work well with cars running an internal vacuum pump, dry sump or vac-u-pan system. Made in the USA! Note: You may have to remark your dipstick (depending on model of pan used) by draining all the oil from the pan, filling it with the recommended number of quarts and marking the new dipstick at that level.