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MDM
M18x1.5 Straight Universal Catalytic Converter with Filter
MDM

M18x1.5 Straight Universal Catalytic Converter with Filter

4.8(22 ratings)

Best price now

$14.99at WalmartChecked Nov 12

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Price facts

  • Last seen at $14.99 at Walmart on Nov 12.

Our take on the M18x1.5 Straight Universal Catalytic Converter with Filter

This is a universal inline catalytic converter with an M18x1.5 threaded oxygen sensor port and a built-in filter, made from 304 stainless steel. It is a generic replacement part, not a vehicle-specific unit, so fit depends on matching your exhaust pipe diameter and sensor thread. It suits DIYers and mechanics fixing a check engine light after exhaust work or replacing a failed converter on an older car. Against OEM converters it is cheaper and easier to source, but it carries no CARB approval, so it is not legal for emissions use in California or other CARB states.

Best forDIY exhaust repairs on older vehiclesReplacing a failed converter on off-road or track carsFixing a check engine light after exhaust modificationsMechanics needing a universal-fit converter
Pros
  • 304 stainless steel resists corrosion
  • M18x1.5 sensor port fits common oxygen sensors
  • Straight-through universal design installs simply
  • Built-in filter element
  • Addresses check engine light codes after exhaust changes
Cons
  • Not CARB-approved, so not legal in emissions-controlled states
  • Universal fit means pipe diameter and length must be matched
  • No vehicle-specific mounting hardware included
  • Little published data on flow and emissions performance

M18x1.5 Straight Universal Catalytic Converter with Filter prices at every store

  • WalmartNew

    In stockSold by BINWOS LIMITEDReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.

    $14.99Free shippingChecked Nov 12
    Visit Walmart

What reviewers say

  • 4.8 / 522 ratings

Rated 4.8 out of 5 from 22 ratings, buyers mostly report it fits as described and clears check engine lights after installation. A few note that fitment takes measuring and that it is not a direct OEM replacement.

What people mention
  • FitmentMixedBuyers say it fits when pipe diameter and sensor thread are matched, but it is not a drop-in OEM replacement.
  • Check engine lightPraisedSeveral owners report the light clearing after installation.
  • BuildPraisedOwners describe the 304 stainless steel as solid and corrosion-resistant.
  • InstallationPraisedBuyers call the install straightforward for DIY work.

About the M18x1.5 Straight Universal Catalytic Converter with Filter

This is a straight universal catalytic converter with a filter, made for exhaust systems. It fits vehicles that have an M18x1.5 threaded oxygen sensor port. It is sold as a single piece.

The body is made from 304 stainless steel, which resists corrosion. It is designed to install without complicated procedures, for DIY users and professional mechanics alike.

It is intended to address check engine light concerns that can follow exhaust modifications or catalytic converter removal, by helping restore proper sensor readings.

Brand
MDM
Thread size
M18x1.5
Material
304 stainless steel
Type
Straight universal catalytic converter with filter
Compatibility
Vehicles with M18x1.5 threaded oxygen sensor ports
Quantity
1 piece

Specifications

number_of_pieces
1Source
size
M18x1.5Source

Questions and answers

Will this fit my car?
Only if your exhaust pipe matches the converter's inlet and outlet size and your oxygen sensor uses an M18x1.5 thread. Measure the pipe before buying; it is not vehicle-specific.
Is it legal in California?
No. It is a universal converter without CARB approval, so it cannot be used on emissions-controlled vehicles in California or other CARB states.
Will it clear my check engine light?
It is designed to restore sensor readings after exhaust modifications or converter removal, which can clear related codes. It will not fix codes caused by other faults.
What is included?
One converter with a built-in filter and an M18x1.5 sensor port. Mounting hardware and gaskets are not listed.
How does it compare with an OEM converter?
It is a generic universal part rather than a direct-fit OEM unit, so it needs measuring and adapting. It offers simpler sourcing and installation but no emissions certification.
Where is the M18x1.5 Straight Universal Catalytic Converter with Filter cheapest?
At Walmart, for $14.99, as of our latest check.
What do buyers say about the M18x1.5 Straight Universal Catalytic Converter with Filter?
Rated 4.8 out of 5 from 22 ratings.

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