EC781 OIL FILTER CAP BILLET ALUMINUM ANODIZED FOR FL2016 03-07 6.0L 08-10 6.4L POWERSTROKE F250-F550 03-05 EXCURSION 3C3

iFJF part No.: FJ-CAP10-CK. Product Overview The EC781 Billet Aluminum Oil Filter Cap is the permanent fix for the most common oil change headache on Ford 6.0L and 6.4L Powerstroke diesel engines. CNC-machined from a solid block of 6061-T6 aluminum with a precision 36mm hex, this cap replaces the failure-prone OEM plastic filter cap ( 3C3Z-6766-CA / 1840754C91 ) that cracks, warps, and rounds off during removal. Key Features Solid Billet 6061-T6 Aluminum : CNC-machined from a single aluminum billet not cast, not molded. Withstands infinite heat cycles without degradation. Precision 36mm Hex : Sharp, defined hex edges provide positive socket engagement. No slipping, no rounding even on stubborn caps that have been overtightened. Anodized Finish : Black or silver anodized coating resists corrosion from oil, road salt, and diesel shop chemicals. Looks great and stays that way. Viton O-Ring Included : Upgraded Viton O-ring provides superior heat resistance (-20 F to 400 F) compared to the OEM Buna-N seal. Won't harden and leak over time. Exact OEM Dimensions : Same thread pitch, height, and sealing surface geometry as the factory cap. Compatible with ALL FL2016/PF2016 filter cartridges. Compatibility Year Make Model Engine 2003-2007 Ford F-250/F-350/F-450/F-550 Super Duty 6.0L Powerstroke V8 2008-2010 Ford F-250/F-350/F-450/F-550 Super Duty 6.4L Powerstroke V8 2003-2005 Ford Excursion 6.0L Powerstroke V8 2003-2010 Ford E-350/E-450 Super Duty 6.0L Powerstroke V8 Specifications Specification Value Part Number FJ-CAP10-CK (Black) / FJ-CAP04-01-SI (Silver) OE Cross Reference 3C3Z-6766-CA, 1840754C91 Material 6061-T6 Billet Aluminum Finish Anodized Black or Silver Socket Size 36mm Hex Torque Spec 18-22 ft-lbs Includes EC781 Cap + Viton O-Ring Why Upgrade? Ask any 6.0L or 6.4L Powerstroke owner about their worst oil change experience, and 9 out of 10 will mention the plastic oil filter cap. It swells when hot, welds itself to the housing, then rounds off when you try to remove it. The EC781 billet cap ends this cycle. One purchase, permanent peace of mind. 12-month warranty. Frequently Asked Questions Q: Does this include the oil filter? A: No. This listing is for the EC781 billet aluminum oil filter cap only. The FL2016 oil filter is sold separately. We also offer a combo kit (cap + filter) for convenience. Q: How is this better than the OEM plastic cap? A: The OEM cap is injection-molded plastic that becomes brittle from heat cycling. Common failures: (1) 36mm hex rounds off during removal, (2) cap warps and leaks oil, (3) tabs crack under torque. Our EC781 is solid 6061-T6 billet aluminum machined, not molded. It won't crack, warp, or round off. Q: What color options are available? A: Available in black anodized and silver anodized finishes. Both offer the same corrosion resistance and durability. Choose based on your engine bay aesthetic preference. Q: Can I use my existing FL2016 filter with this cap? A: Yes. The EC781 cap is dimensionally identical to the OEM cap it fits all FL2016 and PF2016 filter cartridges from any brand (Motorcraft, WIX, Baldwin, etc.).