Skip the auto shop - Our mechanics make house calls

Q: What happens if i replace the catalytic with a thrush muffler and put a DC sports exhaust about 2 feet away from the thrush.

asked by on

What happens if i replace the catalytic with a thrush muffler and put a DC sports exhaust about 2 feet away from the thrush. Will this sound bad? Will it make a difference on the HP and Gas mpg. Thxs

My car has 200000 miles.
My car has a manual transmission.

A: Removal of the catalytic converter on a car...

Removal of the catalytic converter on a car that will be operated on the street is very illegal, and can get you a huge fine from the EPA. Also, since most modern vehicles are designed to run with some system back pressure, you may actually notice a decrease in performance, due to the way exhaust flows out of the manifold and through the system.

The vehicle will certainly be louder, and may or may not sound better, depending on who's listening. Generally small displacement four cylinder engines with an almost completely free flowing exhaust are a love it or hate it sound.

However, I stress again that this is illegal to do, unless you plan to operate the vehicle off public roads only, such as on a race track or for off road use. If you want to increase the performance, it's best to do some research and decide which exhaust system and high performance catalytic converter would work best for your vehicle, and go with those parts.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: The clutch lever that the slave cylinder pushes is not pushing/springing back

It sounds like you may have to replace the clutch. Clutches can fail in a number of different ways and exhibit a multitude of symptoms. Most people are acquainted with clutches that slip from simple wear, but it sounds like...

Q: It starts but won't stay running.

Hi There, If the motor will start this means you generally do not have any issues with spark or ignition problems. Typically when a motor struggles to stay running, it is often related to a fuel supply problem. This may...

Q: Check Engine Light is on and engine is quaking and stalling - 2006 Mercedes Benz C55 AMG

Hello. If the Check Engine Light has come on, then that means the computer has detected some sort of issue. I would rescan the computer to see if the same code has returned, even after cleaning the sensor. If cleaning...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...