Dorman Intake Manifold Replacement Kit for Ford 5.4L V8 - Polymer, Integrated Gaskets & Thermostat

The Dorman 615-188 is a complete polymer intake manifold replacement kit for select Ford 5.4L V8 trucks, SUVs and vans that includes integrated gaskets, thermostat and fittings for a reliable, OEM-fit repair.

If your Ford with a 5.4L V8 is showing intake-manifold–related symptoms, this Dorman assembly offers a ready-to-install option engineered and manufactured in the USA. Designed to match the fit and airflow characteristics of the factory part while incorporating targeted improvements, the kit arrives with every main component needed to swap the manifold without multiple parts orders or aftermarket compromises.

How does this Dorman manifold differ from the original Ford design?

The Dorman part keeps the original fit and performance intent but updates a few key areas to reduce leak risk and simplify installation. Integrated gaskets sit in the manifold instead of using a carrier gasket approach, and the thermostat and coolant fittings are revised to improve sealing and serviceability.

• Integrated manifold gaskets reduce head contact points to lower air-leak likelihood.
• Reworked thermostat and coolant fittings help prevent coolant seepage common with older units.
• Polymer construction resists corrosion and matches factory routing for accessories and sensors.

What exactly comes in the complete replacement kit?

The kit is supplied as a single package so you have all necessary parts for a proper replacement without scavenging additional hardware. Dorman includes manifold-specific gaskets and hardware tailored for this assembly, plus a thermostat and auxiliary fittings that integrate directly into the manifold.

• Polymer intake manifold body with integrated PCV nipple and mounting points.
• Specially designed gaskets, O-ring, self-tapping screws and clamp for the coolant cap.
• Auxiliary coolant fitting and updated thermostat to help ensure leak-free operation.

Will this fit my vehicle and how do I confirm compatibility?

Fitment is vehicle-specific — always verify before ordering using the product page garage tool and Confirmed Fit indicator. If you see an information icon, hover over it for details; some applications require additional verification or have notes about supplemental parts.

• Enter year, make and model in the garage tool on the product page to confirm fit.
• Check for any blue “i” icons and review their fitment notes carefully.
• Contact support with VIN details if you need extra assurance before purchase.

How will installing this manifold affect engine service and reliability?

Replacing a worn or damaged intake manifold with this Dorman unit restores proper sealing, vacuum routing and coolant passage integrity that can degrade over time. The integrated PCV nipple and improved thermostat reduce the chances of vacuum leaks and coolant seepage, helping the engine run cleaner and minimizing repeat visits for manifold-related failures.

• Integrated PCV nipple maintains correct crankcase ventilation and vacuum continuity.
• Updated thermostat design and clamp reduce coolant leak points.
• Complete hardware kit cuts downtime by eliminating additional parts sourcing.

Who is this for: The Dorman 615-188 is intended for DIY mechanics, independent shops and fleet technicians working on select Ford 5.4L V8 trucks, SUVs and vans who want a U.S.-made, ready-to-install replacement. If you need a direct-fit alternative to dealer parts with improved sealing features and a full parts kit included, this assembly is built to simplify the repair and get the vehicle back on the road without unnecessary delays.