Skip the auto shop - Our mechanics make house calls

Q: What type of exhaust piping can be welded using a mig welder

asked by on

I would like to straight pipe my car but i'm not sure what type of piping material I should buy or what size of piping. I have a 1.8l gas engine non-turbo'd. I can measure and weld the piping i'm just not sure what size of piping would be best for both sound and power.
My car has a manual transmission.

A: I would stick with mild steel exhaust tubin...

I would stick with mild steel exhaust tubing and use 18 gauage or 16 gauage (thicker wall) to weld with a MIG welder. If you use "aluminized" tubing - available from the big box aftermarket suppliers, that’s should be okay but just remember to thoroughly grind the 1/2" or so of heat-affected area where you will weld. As for diameter, going more than 1/4" in diameter larger than the stock pipe diameter (1 3/4" vs 1 1/2" for example), is excess weight and money. A small amount of "backpressure" is needed in the exhaust system.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: What could it be?

Hello. If there is a knocking noise coming from that wheel it can be caused by a number of things. Most of the time this is caused by either a cv axle that is failing or a hub bearing that...

Q: Heavy vibration while in neutral and driving at low speeds

It is not clear if you are moving when in neutral and the vibration occurs only then as that would require consideration of axle imbalances. If you are instead stopped in neutral and the vibration occurs, obviously the problem has...

Q: Manifold overheat!! Its (KILLING ME!)

Hello. Thanks for writing in. The vehicle's malfunction with the exhaust system has likely caused the catalytic converter to fail. Unless there is a foreign object in the tail pipe clogging the airflow, it is the catalytic converter which is...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...