PPE DEF Filler Cap 11-26 Ford 6.7L Powerstroke | 20-26 GM 3.0L/6.6L Duramax

Manufactured from 6061 billet aluminum, the cap features a durable blue anodized finish for corrosion resistance and a distinctive appearance. OEM-style internal threads provide a proper fit, while an integrated O-ring creates a secure seal over the filler neck to help prevent contaminants and moisture from entering the DEF system. The fluted exterior provides additional grip, making the cap easier to install and remove during routine DEF refills. Whether you're replacing a worn factory cap or upgrading the appearance of your engine bay, the PPE Billet Aluminum DEF Filler Cap offers durable construction and dependable protection.