My exhaust has disintegrated from the big muffler, to the end, and while it would be cheaper to just replace, I'm thinking of running a twin system.
The 93 doesn't has sensors or computer, so can I do this, without compromising fuel mileage, or anything else?

Any help would be appreciated, as I've only a few weeks, before having to get a new warrant, which has to be done every six months, down here.