Davico 18178 Catalytic Converter - Front Left
OE Quality 60-Day Returns
Davico
 Exact-Fit Catalytic Converter

Davico 18178 Catalytic Converter - Front Left

Brand Davico 18178
Position Front Left
Gaskets Included Yes
Height 10 in.
Inlet 1 Gsk. Eg24405
Inlet 2 Gsk. Eg24021
Large Pkg. Fee No
Outlet 1 Gsk. Eg24807
Over All Length 56 in.
Use Davico Decarbonizing Induction Kit 1540ea Yes
Width 10.5 in.
Product line Exact-Fit Catalytic Converter
Fits Subaru · 4 vehicles

Exact-Fit design. Built from original equipment sample parts for proper fit and function.

OBDII catalyst. Uses an emissions-reducing catalyst for current OBDII vehicle demands.

Gaskets included. Includes the listed inlet and outlet gasket references for installation.

$637.68Free 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 $637.68
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 options

Exact-Fit Catalytic Converter

Davico 18178 is an Exact-Fit Catalytic Converter built from original equipment sample parts to match fit and function on the application. It uses an emissions-reducing catalyst formulated for OBDII vehicles and includes the required gaskets for the listed installation points.

Key Features

  • Exact-Fit design based on original equipment sample parts.
  • Emissions-reducing catalyst for OBDII vehicle requirements.
  • Includes gaskets for the inlet and outlet connections.
  • Overall length measures 56 in. with a 10 in. height and 10.5 in. width.
  • Fits 2004-2005 Subaru Legacy, front left.
  • Fits 2004-2005 Subaru Outback, front left.

Detailed Description

Davico part number 18178 is a catalytic converter for Subaru Legacy and Subaru Outback applications that require an Exact-Fit replacement. The design follows original equipment sample parts to maintain proper fitment and function, while the catalyst is selected to meet the demands of current OBDII emissions systems. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

  • Failed catalytic converter efficiency codes.
  • Restricted exhaust flow from a worn converter.
  • Emissions test failures related to catalyst performance.
  • Fitment issues when replacing the original converter on the listed Subaru Legacy and Subaru Outback applications.

Installation Notes and Tips

Verify the vehicle’s emissions configuration before ordering, since the listed fitment includes California emissions notes and state-use restrictions. Confirm the bracket location and connection points against the existing exhaust layout before installation. Use the specified gasket references for the inlet and outlet connections, and follow the vehicle service procedure for exhaust sealing and sensor handling.

Quality Assurance

Davico Exact-Fit Catalytic Converters are engineered from OE sample parts to support proper fit and function on the specified application.

Related reading

This part fits 4 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelTransmissionLitersCylindersPositionNotes
2005SubaruLegacyAutomatic2.5LH4Front LeftNot legal for use in California; Illegal for installation in NY on vehicles equipped with California emission systems; California Emissions; w/ bracket 20" from outlet flange; Exact-Fit Catalytic Converter
2005SubaruOutbackAutomatic2.5LH4Front LeftNot legal for use in California; Illegal for installation in NY on vehicles equipped with California emission systems; California Emissions; w/ bracket 20" from outlet flange; Exact-Fit Catalytic Converter
2004SubaruLegacyAutomatic2.5LH4Front LeftNot legal for use in California; Illegal for installation in NY on vehicles equipped with California emission systems; California Emissions; w/ bracket 20" from outlet flange; Exact-Fit Catalytic Converter
2004SubaruOutbackAutomatic2.5LH4Front LeftNot legal for use in California; Illegal for installation in NY on vehicles equipped with California emission systems; California Emissions; w/ bracket 20" from outlet flange; Exact-Fit Catalytic Converter