Q: My catalytic converter is gutted, with no engine lights on. Is this bad for performance?

asked by on September 27, 2017

I got my exhaust done about a year ago and the guy who did it, straight piped it and gutted my cats.. so it is really loud and doesn't sound bad.. but I am about to add performance headers and other parts such as turbocharging it and I don't want this to be an issue.. I am not too knowledgeable when it comes to cars and performance enhancement, but I would like to have that Subaru rally sound with my car? Should i buy a new catalytic converter for my car or are there other ways of doing it?

My car has 45000 miles.
My car has a manual transmission.

Hello, thank you for writing in. The catalytic converter is there to remove certain emissions like CO and NOx before your exhaust is pumped into the environment. While this is the practical and "environmentally responsible" thing to do, your vehicle does not need it to perform. It also has little effect on the sound, as your muffler does most of the sound control. The catalytic converter can be left off of the exhaust system as long as there are no oxygen sensors that will throw you check engine light. You would have known by now if that was a problem. Look into videos that give you some idea of the sound you will be getting out of your new equipment before choosing the right set up for you.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Engine occasionally misfires

Hi there, thanks for writing in. In most cases, if you have an error code show up, make the change of components and don't reset to the error code with a digital scanner, the issue will still continue. This is...

White smoke coming from tail pipe.

While vehicle smoke can appear in a wide range of colors, white smoke from the exhaust is often an indication that the car is burning coolant in the engine. Coolant is normally found in the cooling system and can enter...

I have an exhaust smell in my car and I need to figure out why and where it is coming from?

Hi there. First check the blend doors to the heater / air conditioning system. If you are smelling ambient air smells in the cab, then the blend doors may be opening to the outside air. For the exhaust leak, check...

Related articles

2012 Volkswagen Jetta vs. 2012 Subaru Forester: Which One Should I Buy?
Mid-size sedans are the realm of small families or commuters who want a slightly larger vehicle than a subcompact or compact car, yet don’t want to fully give up their good gas mileage. The sedan offers more comfort and space...
4 Essential Things to Know About Your Car’s Muffler
The The muffler on a vehicle is designed to reduce the amount of noise coming from the exhaust system of your automobile. The muffler quiets the sound pressure that the engine creates by using acoustic quieting, which means the muffler...
What Are the Benefits of an Aftermarket Exhaust System?
All All cars must have an exhaust system in order to vent gases from the engine. However, your car’s stock exhaust system probably isn’t all it could be. Automakers are required to make a number of trade-offs to ensure that...