Stop exhaust leaks and keep spent gases moving cleanly with the Dorman - OE Solutions Exhaust Manifold 674-497, an OE FIX upgrade for the left-side manifold on the 2019-2024 and 2026 Ram 1500 and the 2022-2023 Jeep Wagoneer, all with the V8-5.7L engine. On these vehicles the cylinder deactivation system shuts down four of the engine's eight cylinders during highway cruising, cooling two exhaust ports while two stay hot; that uneven thermal cycling stresses the original manifold until it warps or cracks. This patent-pending redesign is built to withstand that stress.
Improved design: patent-pending upgrades help prevent damage from thermal cycling of the cylinder deactivation system.
Innovative construction: an integrated outer flange strengthens the sides, a thicker inner flange, and a ceramic coating promotes uniform heat distribution.
Ready-to-install kit: includes the required inlet gasket and hardware — 2 mounting bolts, 5 nuts, 5 mounting studs, 2 retainer nuts, and 2 additional bolts, plus the manifold itself.
Specs: ductile iron, ceramic-coated, black finish; round ports, 60 mm collector port, 0.125 in tube wall, 10 mounting holes. No oxygen sensor port; no heat shield included.
Engineered to help restore leak-free, reliable exhaust flow when the original left-side manifold is warped, cracked, or failed. Country of origin: China. Manufacturer part number 674-497.
This part cross-references / interchanges with the following part numbers:
68591573AA, 68591573AB
Frequently Asked Questions
Which vehicles does the 674-497 fit?
It replaces the left-side exhaust manifold on the 2019-2024 and 2026 Ram 1500 and the 2022-2023 Jeep Wagoneer, all equipped with the V8-5.7L engine. See the Buyer's Guide tab to confirm your vehicle.
What comes in the kit?
One exhaust manifold, an inlet gasket, and hardware: 2 mounting bolts, 5 nuts, 5 mounting studs, 2 retainer nuts, and 2 additional bolts.
Why do the original manifolds crack on these trucks?
The cylinder deactivation system shuts down four of eight cylinders during highway driving, leaving two ports hot and two cool. This uneven thermal cycling stresses the manifold until it warps or cracks.
Is a heat shield or oxygen sensor port included?
No. This manifold has no oxygen sensor port, and no heat shield is included. Transfer or replace any related components as directed by the vehicle service procedure.
What is this manifold made of?
It is ductile iron with a ceramic coating and a black finish. The ceramic coating is designed to promote uniform heat distribution across the manifold.
Exhaust Manifold Kit - Includes Required Gaskets And HardwareThis exhaust manifold was precision-engineered and durably manufactured to match the fit and function of the original manifold on...
Exhaust Manifold Kit - Includes Required Gaskets And HardwareThis exhaust manifold was precision-engineered and durably manufactured to match the fit and function of the original manifold on...
WARNING:
These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to
www.P65Warnings.ca.gov.
