HomeExhaust > Catalytic ConverterDorman 674-080 Catalytic Converter with Integrated Exhaust Manifold
Part #: 674-080

Dorman 674-080 Catalytic Converter with Integrated Exhaust Manifold

⚙️ 6 vehicles fit this part
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Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Honda, Civic
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Overview of Dorman Catalytic Converter with Integrated Exhaust Manifold

The Dorman 674-080 catalytic converter with integrated exhaust manifold is designed specifically for Honda Civic models. This natural-colored, stainless steel component combines the exhaust manifold and catalytic converter into a single unit, providing a streamlined solution for exhaust emissions control.

  • Constructed from durable stainless steel for corrosion resistance
  • Regular grade type with a 4-inch converter body length
  • Flanged outlet type with one inlet and one outlet port
  • Includes inlet gasket and outlet gasket for proper sealing
  • Equipped with two sensor ports for oxygen sensors
  • Oval-shaped inlet port with six mounting holes for secure fitment
  • Compatible with Honda Civic exhaust systems requiring an 18-inch overall length component

Detailed Product Description

The Dorman 674-080 catalytic converter with integrated exhaust manifold is engineered to meet the exhaust requirements of Honda Civic vehicles. Its stainless steel construction ensures long-lasting durability against heat and corrosion. The converter body measures 4 inches in length, integrated seamlessly with the exhaust manifold to reduce installation complexity and potential leak points. The flanged outlet design and oval inlet port with six mounting holes provide a precise fit, maintaining proper exhaust flow and emissions control. This part includes both inlet and outlet gaskets to ensure a tight seal during installation. Additionally, the unit features two sensor ports to accommodate oxygen sensors necessary for engine management and emissions monitoring.

Common Applications and Problem Resolution

  • Replacement for damaged or rusted catalytic converters on Honda Civic exhaust systems
  • Solves exhaust leaks caused by manifold cracks or gasket failure
  • Addresses check engine light issues related to oxygen sensor malfunctions
  • Helps restore proper emissions control and exhaust flow
  • Suitable for vehicles requiring a non-CARB compliant catalytic converter with integrated manifold

Installation Notes and Tips

When installing the Dorman 674-080 catalytic converter with integrated exhaust manifold, ensure all mounting surfaces are clean and free of debris. Use the included inlet and outlet gaskets to prevent exhaust leaks. Note that inlet mounting hardware is not included, so existing bolts should be inspected and replaced if necessary. Proper torque specifications should be followed to avoid warping or damage. The two sensor ports require correct oxygen sensor installation to maintain engine performance and emissions compliance.

Quality Assurance and Warranty

Dorman manufactures this catalytic converter with integrated exhaust manifold to meet industry standards for fit and function on Honda Civic models. While this part is not California Air Resources Board (CARB) certified, it is constructed from stainless steel to provide corrosion resistance and durability. Warranty details should be confirmed at the point of purchase, as coverage may vary.

BrandDorman
Part Number674-080
ColorNatural
Grade TypeRegular
Converter Body Length4
Outlet TypeFlanged
Inlet Quantity1
Outlet Quantity1
California Air Resources Board (CARB) CertifiedNo
Inlet Mounting Hole Quantity6
Inlet Gasket IncludedYes
Inlet Mounting Hardware IncludedNo
Outlet Mounting Hole Quantity3
Outlet Mounting Hardware IncludedYes
Overall Length18
Air Tube Count0
Sensor Port Count2
Converter Body MaterialStainless steel
CARB Executive Order NumberNot carb compliant
Inlet Port ShapeOval
Package Contents1 exhaust manifold; 1 inlet gasket; 1 outlet gasket; 8 bolts; 8 w

This part fits 6 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2021HondaCivic2.0LL4N/ACARB Compliant: No; CARB Compliant: No
2020HondaCivic2.0LL4N/ACARB Compliant: No; CARB Compliant: No
2019HondaCivic2.0LL4N/ACARB Compliant: No; w/Federal Emissions; CARB Compliant: No
2018HondaCivic2.0LL4N/ACARB Compliant: No; w/Federal Emissions; CARB Compliant: No
2017HondaCivic2.0LL4N/ACARB Compliant: No; w/Federal Emissions; CARB Compliant: No
2016HondaCivic2.0LL4N/ACARB Compliant: No; w/Federal Emissions; CARB Compliant: No

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

181505BAA00

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.