MOCW 6.0 Powerstroke HPOP STC Fitting Replacement Kit for Ford 6.0L — Seal Kit & Support Bracket

This MOCW 6.0 Powerstroke HPOP STC fitting upgrade kit replaces the faulty OE 4C3Z9B246F fitting to stop leaks and restore reliable high‑pressure oil delivery on Ford 6.0L Powerstroke engines.

If your 6.0L Powerstroke shows hard starts or oil leaks around the high pressure oil pump (HPOP) fittings, the problem is often the original snap‑to‑connect (STC) fitting. MOCW's kit updates the connection hardware, supplies the correct seals and mounting hardware, and includes a support bracket so you can replace the troublesome parts without hunting for multiple components. The kit is built as a direct replacement for the OEM part numbers listed and fits a wide range of 2005–2010 Ford E‑Series and 2005–2007 Super Duty models with the 6.0L turbo diesel.

How does this kit fix common HPOP leak and hard‑start issues?

The kit replaces the problematic STC fitting and related fasteners with a refreshed adapter, seal kit, and support bracket to reestablish a reliable high‑pressure oil path. Replacing worn seals and the branch tube adapter reduces the chance of oil seepage that can cause air intrusion and hard starts when the engine is hot.

• Includes hydraulic pump seal kit to renew all pressure seals
• Supplies a male branch tube adapter and female HPOP adapter fitting
• Comes with pump bolts and branch tube bolts sized for direct installation
• Support bracket stabilizes the adapter to prevent vibration‑related leaks

What exact parts are included and which OEM numbers does it replace?

This MOCW kit bundles the hardware needed for a complete STC fitting update: bracket, seals, adapter fittings, and the correct bolts for the HPOP and branch tube. It is intended as the replacement for Ford OE references so you can match the part to your vehicle before ordering.

• 1 support bracket and 1 hydraulic pump seal kit
• 1 male branch tube adapter and 1 female HPOP adapter fitting
• Hardware: two M6 x 35 mm branch tube bolts, M8 x 60 mm pump bolts, and an M8 x 45 mm pump bolt
• OEM cross references: 4C3Z‑9B246‑F, 4C3Z9B246F, 9B246, 3C3Z‑9H529‑A, 3C3Z9H529A

Which Ford models and years will this kit fit?

The kit is compatible with Ford vehicles that use the 6.0L (363 cid) Powerstroke diesel and the later HPOP style for E‑Series vans. Confirm the VIN engine code and OEM part number before purchase to ensure proper fitment.

• 2005 Ford E‑350 Club Wagon and 2005–2010 E‑350 Super Duty (6.0L, Vin "P")
• 2005–2010 Ford E‑450 Super Duty (6.0L, Vin "P")
• 2005 Ford Excursion and 2005–2007 F‑250, F‑350, F‑450, F‑550 Super Duty (6.0L)
• Note: fits E‑Series with the new style HPOP only — verify part numbers

How should I prepare and what should I expect during installation?

Installation requires basic mechanical tools and care to avoid contaminating the high‑pressure oil system. Replace the seals and fittings with clean parts, torque bolts to manufacturer specs, and inspect for leaks before road use. If you’re unsure, have a professional diesel tech perform the work.

• Clean working area to prevent debris entering HPOP or fuel system
• Use correct torque values and thread orientation for new bolts
• Prime system and check for leaks at operating temperature
• Have OEM part numbers on hand to confirm compatibility

Who is this for: This MOCW HPOP STC fitting upgrade kit is aimed at owners and technicians of Ford 6.0L Powerstroke vans and Super Duty trucks (2005–2010 E‑Series, 2005–2007 F‑Series) who need a direct, OEM‑referenced replacement for leaking STC fittings. It’s suitable for DIY mechanics comfortable with engine‑bay repairs and for shops looking to address a common failure point efficiently with all required parts in one kit. Always verify OE part numbers and VIN engine code before ordering.