How to replace the catalytic converter that are integral with the exhaust manifold for four cylinder engine on Mazda 6?

On 2.3L models, the exhaust manifold and the catalyst converter are the same part, and the catalyst converter has to be replaced. Starting with lifting the vehicle up and putting it on jackstands. After the engine has cooled, moisten the retaining nuts of the manifold heat-shield with penetrating oil in order to ease any rust present and remove the heat shield, smear the mounting bolts of the exhaust manifold with penetrating oil. Uncouple the exhaust pipe with the exhaust manifold and dispose the old flange gasket. Disconnect the electrical connector to the oxygen sensor and take away the oxygen sensor. The next step is to take out the exhaust manifold mounting nuts and then the exhaust manifold and the old gasket. Take out the old studs of the cylinder head by using a stud removing tool or a couple of nuts screwed to each other. Check the exhaust manifold to see whether it has cracks or damage, in case it has a crack, replace it. Wipe the mating surfaces of the manifold and the cylinder head carefully without scratching or gouging the gasket surface which can cause leakage of exhaust. Use straightedge and feeler gauge to measure the mating surface of the exhaust manifold and make sure that it is not warped beyond acceptable limits. Fit new exhaust studs to the cylinder head, then the manifold with a new gasket and self locking nuts beyond that, coating the thread of the new exhaust manifold studs with anti-seize compound. Install the nuts in phases with the tightening always at the centre to the desired process of torque and ensure the entire installation process is complete by fixing any leaks.

Genuine Mazda 6 Exhaust Manifold

Engine Exhaust Manifold

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8 Exhaust Manifolds found

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Mazda 6 Exhaust Manifold Part Number: L327-13-450F
$762.28 MSRP: $1041.57
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Product Specifications
- Other Name: Manifold, Exhaust
- Replaces: L327-13-450B, L327-13-450, L327-13-450A, L327-13-450C
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2003-2005 Mazda 6 | i, S | 4 Cyl 2.3 L GAS, 6 Cyl 3.0 L GAS
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Mazda 6 Exhaust Manifold Part Number: L3K9-13-450
$958.92 MSRP: $1310.26
You Save: $351.34 (27%)
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Product Specifications
- Other Name: Manifold, Exhaust
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2006-2007 Mazda 6 | i, Mazdaspeed, S | 4 Cyl 2.3 L GAS, 6 Cyl 3.0 L GAS
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Mazda 6 Converter Part Number: PY8V-13-450L
$1381.25 MSRP: $1887.33
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Product Specifications
- Other Name: Manifold, Exhaust; Converter, Exhaust Manifold, Manifold
- Replaces: PY8V-13-450G, PY8V-13-450E, PY8V-13-450J, PY8V-13-450K, PY8V-13-450D, PY8V-13-450H, PY8V-13-450F
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2018-2021 Mazda 6 | Carbon Edition, Grand Touring, Grand Touring Reserve, Signature | 4 Cyl 2.5 L GAS
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Mazda 6 Exhaust Manifold Part Number: L362-13-45XG
$1572.82 MSRP: $2149.09
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Product Specifications
- Replaces: L362-13-45XF, L362-13-45X, L362-13-45XB, L362-13-45XC, L362-13-45XE, L362-13-45XD
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2005-2006 Mazda 6 | i, Mazdaspeed, S | 4 Cyl 2.3 L GAS, 6 Cyl 3.0 L GAS
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Mazda 6 Exhaust Manifold Part Number: L3H8-13-45XC
$1942.35 MSRP: $2654.02
You Save: $711.67 (27%)
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Product Specifications
- Replaces: L3H8-13-45XB, L3H8-13-45X, L3H8-13-45XA
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2007-2008 Mazda 6 | i, Mazdaspeed, S | 4 Cyl 2.3 L GAS, 6 Cyl 3.0 L GAS
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Mazda 6 Exhaust Manifold Part Number: CY01-13-451A
Product Specifications
- Other Name: Manifold, Exhaust
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2009-2013 Mazda 6 | S | 6 Cyl 3.7 L GAS
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Mazda 6 Exhaust Manifold Part Number: CY01-13-4F1A
Product Specifications
- Other Name: Manifold, Exhaust
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2009-2013 Mazda 6 | S | 6 Cyl 3.7 L GAS
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Mazda 6 Exhaust Manifold Part Number: L322-13-450C
Product Specifications
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2006-2008 Mazda 6 | i, Mazdaspeed, S | 4 Cyl 2.3 L GAS, 6 Cyl 3.0 L GAS

Mazda 6 Exhaust Manifold

The Mazda 6 Exhaust Manifold directs hot gases from every cylinder into a single stream, allows the sedan to breathe freely, and protects the passengers against toxic fumes. This Exhaust Manifold is placed on the top or side of the engine block, enclosed by a gasket which collects the burned mixture as soon as it is forced out by the piston, directing the mixture to the catalytic converter, muffler, and tailpipe to avoid intake reversion which steals power. Designs adapted to Mazda models have not varied in purpose, but vary between heavier cast iron components and lighter stainless steel components, and in each case the runners are intertwined to provide a runner per cylinder, the engine, being six cylinders, having six separate tubes. Since the metal swells and shrinks with the high temperature, cracks may develop, creating an imbalance in the fuel air ratio and permitting harmful gases to leak into the cabin, which is the reason why any Mazda driver needs to replace it immediately. Subsequent Mazda 6 models, though there were no significant changes in style, continued to perfect the shape of the runners in order to accelerate the speed of the gas and decrease backpressure, which is a very minor detail, but it contributes to more favorable engine revs and increases efficiency. Altogether, the Exhaust Manifold is a rather simple but very important linkage between combustion and clean exhaust, and its health is one of the main factors of performance, safety, and durability of any engine of this popular line of midsize cars.

Looking for Exhaust Manifold with proven quality? Choose OEM Exhaust Manifold. Mazda designs and builds them to strict factory specs. Every piece goes through rigorous quality checks. You'll get parts that fit right and work like new. Shop our huge inventory of OEM Mazda 6 parts. Enjoy the highly competitive prices online. Our site is your one-stop shop. Each genuine 6 part includes a manufacturer's warranty. Buy with confidence. Our return policy is simple and hassle-free. In a rush? Choose expedited delivery at checkout. You'll love the streamlined experience from search to checkout to receiving your order.

Mazda 6 Exhaust Manifold Parts and Q&A

Exhaust Manifold
L362-13-45XG
Q: How to replace the catalytic converter that are integral with the exhaust manifold for four cylinder engine on Mazda 6?
A:
On 2.3L models, the exhaust manifold and the catalyst converter are the same part, and the catalyst converter has to be replaced. Starting with lifting the vehicle up and putting it on jackstands. After the engine has cooled, moisten the retaining nuts of the manifold heat-shield with penetrating oil in order to ease any rust present and remove the heat shield, smear the mounting bolts of the exhaust manifold with penetrating oil. Uncouple the exhaust pipe with the exhaust manifold and dispose the old flange gasket. Disconnect the electrical connector to the oxygen sensor and take away the oxygen sensor. The next step is to take out the exhaust manifold mounting nuts and then the exhaust manifold and the old gasket. Take out the old studs of the Cylinder Head by using a stud removing tool or a couple of nuts screwed to each other. Check the exhaust manifold to see whether it has cracks or damage, in case it has a crack, replace it. Wipe the mating surfaces of the manifold and the cylinder head carefully without scratching or gouging the gasket surface which can cause leakage of exhaust. Use straightedge and feeler gauge to measure the mating surface of the exhaust manifold and make sure that it is not warped beyond acceptable limits. Fit new exhaust studs to the cylinder head, then the manifold with a new gasket and self locking nuts beyond that, coating the thread of the new exhaust manifold studs with anti-seize compound. Install the nuts in phases with the tightening always at the centre to the desired process of torque and ensure the entire installation process is complete by fixing any leaks.