- About This Product
DescriptionThe DEF-Loc is the locking/tamper-resistant DEF cap for 2019 to 2021 Ram diesel trucks. Locking up your DEF prevents unwanted matter from being put into your DEF tank. The DEF-Loc also features an EPDM U-Cup seal and also has a venting feature cut into the underside of the stainless steel Secure Screw head.
Each DEF-Loc comes with the DEF-Loc cap and two Secure Keys. The locking DEF cap is not designed to work with the OEM tether.