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.

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?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. What happens if i replace the catalytic with a thrush muffler and put a DC sports exhaust about 2 feet away from the thrush.

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

Q: '91 Corolla making rapid rattling sound under hood. Is something loose?

There are many components that can cause rattling, ranging from the exhaust system to accessory drives and pulleys to even certain internal engine malfunctions or a loose/faulty torque converter or flex plate. In addition, there can be multiple (coincident) causes....

Q: Bad muffler sound that gets better after a few miles

If the engine was sputtering and then when the exhaust starts to come off it makes the engine run better, then there is either a plugged muffler or a plugged catalytic converter. To check this, put the exhaust back together...

Q: A lot of white smoke coming from exhaust smelling like oil

White smoke is generally a sign of a blown head gasket which is also associated with the car overheating. When the head gasket fails due to overheating, this can cause oil to get into the water passages in the engine...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...