What does the back box of an exhaust do?

What does the back box of an exhaust do?

The exhaust back box, which is a rear muffler, has the purpose to limit the sound generated by the gas as it passes through the exhaust system. It is located at the very end of the exhaust line and it is the most common muffler on cars.

Is a back box a silencer?

At the rear of the car where the exhaust exits there will commonly be a back box silencer with a tailpipe, or tailpipes connected to it. This is often connected to the centre section via a sleeved fitting. The design and size of the tailpipes can alter the sound produced by the exhaust system.

Will a back box improve performance?

Cat-Backs and Back-Boxes Yes, your engine needs to dump out all that extra gas, and your standard exhaust probably isn’t cutting it. Whilst you can buy performance back boxes, these generally just change your exhaust note and look a bit better – giving you very little (if any) extra power.

Does a back box affect emissions?

No, it’s not parts of the emissions controls so it won’t have any effect on the MOT as long as the car is within noise limits. And that’s where the fun starts as it’s upto the not tester to decide if the car is noticeably louder than a stock exhaust.

Can you drive without exhaust box?

While you can technically drive with a broken exhaust, it’s neither safe nor legal and poses a number of issues when you’re out on the road. Whether your exhaust is simply cracked, is partially hanging off or has fallen off completely, it’s an important part of your vehicle which needs your immediate attention.

Can you remove back box from car?

An exhaust back box or rear silencer forms an integral part of car exhaust systems, despite this however they are not essential for a fully functional exhaust and as such it is not illegal to have it removed.

Are Catback exhausts worth it?

The cat-back system improves airflow, which means the engine doesn’t work as hard to eliminate exhaust fumes. The reduced resistance minimizes the load on the engine, which leads to less fuel consumption. That said, the vehicle miles per gallon (MPG) or fuel economy increases in freeways and city roads.

Do you need a back box on a car?

Will a straight pipe pass MOT?

As long as your emissions are in line then you should be ok. If it’s loud and you have a grumpy MOT tester you might have issues though. “The exhaust system will fail the MOT if: Part of the system missing or excessively deteriorated.

Do I need a back box on car?

What function does the exhaust back box perform in the engine? It takes the hot and fast moving gasses produced by the process of combustion and slows them down. This part is essential when it comes to running a smooth and quiet vehicle.

How loud is too loud for exhaust?

According to the Centers for Disease Control Prevention (CDC), noise above 85dB over a prolonged period of time may start to damage your hearing.

Will my exhaust pass MOT?

Exhausts will only fail an MOT if there’s a major leak, or emissions are deemed unsafe. A minor leak or corrosion would be pointed out on an advisory note as a possible future problem, but it would pass at the time of the test.

Is a rear silencer delete legal?

The removal of an exhaust silencer is illegal, as is any modification to make the vehicle give off a louder noise that the original exhaust.