FYI, some stainless steel is magnetic. There are various grades of stainless steel and depending upon the particular alloy, it can be magnetic. Ferritic stainless steels - these steels are magnetic primarily due to the presence of ferrite, a compound of iron and other elements. The crystals of ferrite and iron make this type of stainless steel magnetic. It is also important to note that some stainless steels with ferrite have a weak magnetic pull. Stainless steel grades 409, 430, and 439 are also known as ferritic stainless steels. Martensitic stainless steels - this category has many types of stainless steel that are magnetic. It is possible for martensitic stainless steel to have a ferromagnetic crystal structure if iron is present. The magnetism of martensitic steel is due to iron being the main component. Martensitic stainless steel has carbon trapped in its crystals are can be hardened to become extremely strong but have reduced chemical resistance compared to austenitic stainless steels. There are three grades of martensitic stainless steel - 410, 420, and 440.
Stainless steel can be magnetic, depending on the grade of steel. 304 SS is not normally magnetic but can become slightly magnetic if cold worked 316 SS is not magnetic at all 409 - 420 SS is all magnetic 409 stainless is often used in automotive exhausts. It will surface rust some, but it won't completely corrode.
Here is the link of the part and the installation around $90 1320performance.com/products/catback-exhaust-for-03-11-honda-element-lx-ex-fwd-awd-4wd Sometime there is a group buy in the element fb groups for around $400 to $500
Do you have any video of how it sounded before the install to compare? Im sure this will have a little deeper tone to it because of the bigger diameter.
I got 23 mpg when it was full stock when I drove it from WA to CA. Since then I been adding lot of mods and didn’t have a chance to drive it for trips yet. That’s something I will have to check.