They will be for a 2008 HD Road King. I‘m not looking to shake windows in my neighborhoodjust something louder than stock. I‘ve been looking at Cobra slip on‘s.
A true dual full exhaust system will always be better than just slip on mufflers. But there are a lot of good mufflers out there like Reinhart, Sampson, Vance Hines, D D, and many others. I went with the true dual system from Cobra exhaust.
No, you can't solder them together. Soldering temperatures are too low to be able to successfully bond copper to iron (galvanized steel pipe.) In addition, water will help conduct a small electrical charge to flow between the 2 metals, and eventually, the iron pipe will completely corrode through. This is called a 'galvanic cell', due the different electron potentials of copper and iron. It actually works like a very low voltage battery - and the iron turns to rust. You can do a couple of things. The best solution is to insert a 'dielectric union' in between both pipes. This union has one side which is brass and the other side is galvanized iron - with a rubber washer in between to isolate the two metals. These are commonly used on hot water tank installations. You can buy a sweat solder type, or a threaded type of dielectric union. You can also install a short brass nipple (about 6 long) with a coupling between the two pipes. The brass is compatible with the copper, but will also protect the galv iron pipe from corroding. Either method is allowable per the plumbing code. Good luck.
once you're searching for overall performance or would desire to do heavy mods down the line, turbochargers and such, a cat-back or finished exhaust may be greater beneficial. once you're only searching for a valid/seems advance, then get an axle-back setup. you will no longer see a huge overall performance distinction the two way, yet getting an entire exhaust enables lots greater airflow which facilitates with engine performance and ordinary overall performance. only make constructive that the muffler you decide on for is nice high quality or it will sound like a fart can. The law enforcement officers will purely make a huge deal if the exhaust would not bypass emission tests, or this is too loud. except you reside in CA, you probable won't have lots complication with law enforcement officers.
This would take some experimentation on your part. But one thing you need to know is that its not the same as other soldering. So you're going to have to get a propane soldering kit. Like 20$ or less at Home Depot or Lowes. And also a wire brush, emory cloth, etc. But in attaching cooper to galvanized pipe, I would try looking for a compression fitting for going from that size of galvanized pipe to the copper pipe and not do any soldering. If the galvanized pipe has no threads, get a die to thread it.
