Can you remove the catalytic converter and replace with a regular exhaust system?

Asked by Mar 07, 2017 at 12:53 PM about the 2010 Subaru Forester 2.5 XT Limited

Question type: Maintenance & Repair

I do not need to go through emissions test - my check engine light came on -
Dealer/Service said $1900 have 140,000 miles - can I replace with just a
regular exhaust system ??  Will the check engine light go off then??

Will the car stall if I do not replace???

5 Answers


Catch 22 on this, Your engine would not run right , gas mileage will go down, engine would run rich, and cause more problems, Check engine light would be on, it would throw a lot of trouble codes,plus it is illegal to do, no one will do this. But there are a lot cheaper after market catalytic converters to be put on, I would just check with an exhaust shop to see what they can find for it. Or you could find one on line and have an exhaust shop put it on for you.


As "Rowefast" suggested, take it to a local exhaust shop and have them install aftermarket converters. My guess is that there are other issues than just the converters.


After market cats are really not that expensive. If you live in Kalifornia be sure and use a cat that is approved for use in the land of fruits and nuts.

1 of 1 people found this helpful.

In order: NO, NO, MAYBE. Subies are notorious for NOT accepting aftermarket CATs; we've all been through this innumerable times, esp with the infamous PO420 code.


That right SubaruBoston, I remember now that you mention it. Memory is a fond thing to have.

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