AP Exhaust 641589 Catalytic Converter with Integrated Exhaust Manifold - Front
OE Quality 60-Day Returns
AP Exhaust
 Direct Fit Converter w/ Manifold

AP Exhaust 641589 Catalytic Converter with Integrated Exhaust Manifold - Front

Brand AP Exhaust 641589
Position Front
Converter Type Federal / epa direct-fit manifold
Inlet Quantity 1
Outlet Quantity 1
California Air Resources Board (CARB) Certified No
Substrate Material Ceramic
Overall Length 13.500
Boxed Yes
Inlet A Connection Type Welded flange
Inlet Gasket Yes
Inlet Hardware None
Inlet Type A 7 bolt welded flange
O2 Sensor Ports 2
Outlet A Connection Type Welded flange
Outlet Gasket Yes
Outlet Hardware Yes
Outlet Type A 2 bolt welded flange
Package Material Corrugated cardboard
Package Type Box
Product line Direct Fit Converter w/ Manifold
Fits Hyundai and Kia · 10 vehicles

Direct-fit manifold converter. Built for straightforward replacement with welded flange connections.

Ceramic substrate. Helps support efficient exhaust flow and emissions control.

Integrated exhaust manifold. Combines two functions in one compact exhaust component.

$471.20Free shipping
In stock · usually ships same day before 1pm CST
Step 1 — Confirm fitment
Free return shipping if it doesn't fit when you check fitment here first.

Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
Step 2 — Quantity
Order total $471.20
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.
Not what you need? See all Catalytic Converter with Integrated Exhaust Manifold options

AP Exhaust 641589 Direct Fit Converter w/ Manifold

AP Exhaust 641589 is a Federal / EPA direct-fit catalytic converter with integrated exhaust manifold for front-position applications. It is built with a ceramic substrate and includes welded flange connections, inlet and outlet gaskets, and two O2 sensor ports for a direct replacement on select Hyundai Sonata and Kia Optima models.

Key Features

  • Federal / EPA direct-fit manifold converter
  • Integrated exhaust manifold design for front installation
  • Ceramic substrate material
  • Welded flange inlet and outlet connections
  • Inlet gasket and outlet gasket included
  • Two oxygen sensor ports
  • Overall length: 13.500 inches
  • AP Exhaust part number 641589

Product Details

This AP Exhaust direct fit converter w/ manifold is engineered for vehicles that require a front catalytic converter and manifold assembly in one unit. The design supports emissions-system replacement on 2016-2020 Kia Optima and 2015-2019 Hyundai Sonata models with ULEV emissions, making it a focused solution for front exhaust service. AP Exhaust 641589 is a practical OE-style replacement for drivers addressing a failed converter, damaged manifold, or leaking flange connection.

The AP Exhaust Direct Fit Converter w/ Manifold product line is built around application-specific exhaust components that match factory-style mounting and sensor placement. For this part, the welded flange layout, ceramic substrate, and dual O2 sensor ports help maintain the original exhaust configuration on the listed vehicles. AP Exhaust 641589 is also a useful reference when searching for a front catalytic converter with manifold for Kia Optima or Hyundai Sonata applications.

Vehicle Fitment

  • Fits 2016-2020 Kia Optima, front; ULEV emissions; direct fit converter w/ manifold.
  • Fits 2015-2019 Hyundai Sonata, front; ULEV emissions; direct fit converter w/ manifold.

Common Replacement Reasons

  • Check engine light related to catalyst efficiency or exhaust flow
  • Cracked or leaking exhaust manifold assembly
  • Failed front catalytic converter on ULEV-equipped vehicles
  • Damaged flange or gasket sealing surfaces
  • Oxygen sensor service tied to the front exhaust section

Installation Notes

Verify the vehicle’s emissions package, engine configuration, and front exhaust layout before installation. This part uses welded flange connections and includes inlet and outlet gaskets; confirm sensor routing and O2 port alignment during removal of the original assembly. AP Exhaust 641589 should be matched to the exact year, make, model, and front-position application listed above.

Quality Assurance

This converter uses a ceramic substrate and Federal / EPA direct-fit construction for the specified applications. AP Exhaust 641589 is intended for use on the listed Kia Optima and Hyundai Sonata vehicles only, and the part number 641589 should be verified against the original exhaust assembly before ordering.

Related reading

This part fits 10 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelSubmodelLitersCylindersFuel TypePositionNotes
2020KiaOptima—2.4LL4—FrontULEV Emissions; Direct Fit Converter w/ Manifold
2019HyundaiSonata—2.4LL4—FrontULEV Emissions; Direct Fit Converter w/ Manifold
2019KiaOptima—2.4LL4—FrontULEV Emissions; Direct Fit Converter w/ Manifold
2018HyundaiSonata—2.4LL4—FrontULEV Emissions; Direct Fit Converter w/ Manifold
2018KiaOptima—2.4LL4—FrontULEV Emissions; Direct Fit Converter w/ Manifold
2017HyundaiSonata—2.4LL4—FrontULEV Emissions; Direct Fit Converter w/ Manifold
2017KiaOptima—2.4LL4—FrontULEV Emissions; Direct Fit Converter w/ Manifold
2016HyundaiSonata—2.4LL4—FrontULEV Emissions; Direct Fit Converter w/ Manifold
2016KiaOptimaLX2.4LL4—FrontULEV Emissions; Direct Fit Converter w/ Manifold
2015HyundaiSonata—2.4LL4GASFrontULEV Emissions; Direct Fit Converter w/ Manifold