6.6l Duramax Engine Oil

Machined from solid billet aluminum. This is a must have to make your ride stand out from the rest. New O-Ring supplied making for an easy installation. 6.6L Chevy/GMC 2016 Duramax or older. These also work on LS engines 2016 and older. Made in the USA!  100% Satisfaction Guarantee. 100% Positive Feedback. Unlike other billet caps, this is not a resale item! I make these and sell these myself. Quality is always held to the highest standard!