Dorman Exhaust Manifold with Integrated Catalytic Converter 674-439
Fits 1998 models
$347.97
In stock
Exhaust
Exhaust Manifold
An exhaust manifold bolts to the cylinder head and collects exhaust from each cylinder into a single outlet for the rest of the exhaust. We carry 32 exhaust manifolds from $69 to $2341 for 1969-2022 vehicles, mostly from Dorman, with fits for the Chevrolet Camaro, Toyota Tacoma, Honda Civic, Nissan Altima, Ford Focus and Ram 1500.
Shop exhaust manifold by vehicle
Dorman Exhaust Manifold with Integrated Catalytic Converter 673-439
Fits 2000 models
$525.97
In stock
Catco Front Exhaust Manifold with Integrated Catalytic Converter 1414
Fits 2012 models
$411.32
In stock
Eastern Catalytic Front Exhaust Manifold with Integrated Catalytic Converter 40810
Fits 2005 models
$479.97
In stock
Replacement Exhaust Manifold with Integrated Catalytic Converter N01-006
Fits 2003 models
$156.95
In stock
DIY Solutions Exhaust Manifold with Integrated Catalytic Converter EXH00855
Fits 2015 models
$288.95
In stock
Dorman Exhaust Manifold with Integrated Catalytic Converter 673-642
Fits 2005 models
$1,025.97
In stock
Eastern Catalytic Left Exhaust Manifold with Integrated Catalytic Converter 40637
Fits 2015 models
$643.97
In stock
API Front Exhaust Manifold with Integrated Catalytic Converter 119613-07356451
Fits 2013 models
$337.32
In stock
Signs of a cracked manifold
Manifolds expand and contract with every drive, and over time they crack or warp and their studs break. The classic sign is a ticking or tapping noise on a cold start that fades as the engine warms and the crack closes. Others include exhaust smell under the hood or in the cabin, black soot marks around a port, a louder exhaust note and a check engine light from false O2 sensor readings. Exhaust leaks near the cabin are a safety concern, so fix them promptly.
Side, contents and design
V6 and V8 engines have left and right manifolds, also listed as driver side and passenger side, and they are not interchangeable. Package contents vary: some include the manifold gasket, flange gasket, studs, nuts and washers, while others are the manifold alone. Check the number of O2 sensor ports and the port shape. On some engines the catalytic converter is built into the manifold, which explains the higher prices on a few listings.
Fitment and installation
Choose your year, make and model and check the fitment table for engine and drive type. Work on a cold engine and soak the studs and nuts with penetrating oil, since broken studs are common. Clean the head surface carefully, use new gaskets and new studs if the old ones are stretched or rusted, and tighten the bolts in the order and torque from your service manual. Transfer the heat shield and O2 sensors from the old manifold.
Exhaust Manifold questions
What does a cracked exhaust manifold sound like?
Most often a ticking or puffing noise that is loudest on a cold start and quieter once the engine warms up. The sound often speeds up with engine rpm.
Is it safe to drive with a cracked exhaust manifold?
It is not recommended. Exhaust gases, including carbon monoxide, can enter the cabin, and the hot leak can damage nearby wiring or hoses. Repair it as soon as you can.
Does a new exhaust manifold come with gaskets?
Some do and some do not. Check the package contents and the gasket included field on the listing. Always use new gaskets and inspect the studs when you install a manifold.