I need to wake up early in the morning? Do laptops have an alarm option?
Exhaust piping is commonly made up of carbon steel . You can get carbon steel exhaust piping with and aluminzied coating which tends to protect it from corroding to soon. The next level is 304 stainless which has even better corrosion resistance due to the lower carbon content. On the high end is 314 and 316 stainless. To check the property of the metal stick a magnet on it . If it is carbon steel or aluminized steel the magnet will stick to it. If it is 304 , 314, 316 the magnet won't stick. Dont use a oxy/act system if you are not experienced with it . You will end up torching your car. Use a sawzall / reciprecating saw aloneg with safety goggles for the eyes. Once you figured out your design take the pipe to a muufles shop and have them expand the ends . They will charge you around $20 . Long term savngs compared to the oxy/act system . Its old skool. Plasma cutters are the in thing now
I say Air, I don't know how you would make air into a costume but I say air, hope i helped
