ALUMINUM BILLET DEF CAP FOR RAM CUMMINS (2013+) CNC 6061-T6 | IFJF

iFJF part No.: FJ-CAP-DEF-BU. CNC Billet Aluminum DEF Cap Premium Upgrade for Ram Cummins (2013+) Replace your flimsy factory plastic DEF (Diesel Exhaust Fluid) cap with this precision CNC-machined 6061-T6 billet aluminum cap . Engineered to withstand extreme temperatures, off-road vibration, and repeated use without cracking, stripping, or fading. The dual O-ring design creates an airtight seal to prevent contamination of your DEF system. Key Features CNC-Machined 6061-T6 Billet Aluminum Far stronger than factory plastic; won't crack, strip, or warp Dual O-Ring Seal System Leak-proof, airtight barrier against dirt, moisture, and DEF crystallization Anodized Blue Finish Corrosion-resistant anodizing maintains its appearance through years of exposure Knurled Grip Surface Easy hand-tightening and removal, even with work gloves or wet hands Tool-Free Installation Simply unscrew the factory plastic cap and thread this one on 10 seconds Precision Thread Match CNC-machined threads guarantee a perfect fit without cross-threading Fitment & Compatibility Year Make Model Engine 2013-2024 Ram 2500 / 3500 / 4500 / 5500 6.7L Cummins Turbo Diesel 2014-2020 Ram 1500 EcoDiesel 3.0L EcoDiesel V6 2014-2020 Jeep Grand Cherokee EcoDiesel 3.0L EcoDiesel V6 Why Upgrade? The factory DEF cap is made of thin plastic that cracks easily, especially in cold climates or after repeated use. A cracked DEF cap allows moisture to enter the tank, causing DEF to crystallize and potentially damaging your SCR system a repair that can cost $2,500+. Our billet aluminum cap eliminates this risk entirely. FAQ Q: Will this fit my 2018 Ram 2500 with the 6.7L Cummins? A: Yes. This cap fits all 2013-2024 Ram 2500/3500/4500/5500 with the 6.7L Cummins diesel engine, plus 2014-2020 Ram 1500 and Jeep Grand Cherokee EcoDiesel models. Q: Is this just a cosmetic upgrade? A: No. While it looks great, the primary benefits are functional: eliminating the risk of a cracked DEF cap contaminating your system, and providing reliable sealing in extreme temperatures. Q: Do I need any tools to install? A: No tools required. Simply unscrew the factory plastic cap and thread this one on. Hand-tighten until snug the dual O-rings create the seal. Q: Will the anodized finish fade? A: Type II anodizing penetrates the aluminum surface, providing UV and chemical resistance that far outlasts paint or powder coating. The color remains vibrant for years. Why Choose iFJF? Every iFJF billet aluminum product is CNC-machined to exacting tolerances. We stand behind our craftsmanship with a satisfaction guarantee and US-based customer support. Related Products Shop All Fuel System Parts Engine Components