Option 1: full replacement system. Black Widow (and others) make 4-1 systems with removable baffles. Expensive, although I'd likely get some money selling mine on. Debatable performace change (more top end less mid range?) and I like the symmetry of twin cans.
Option 2: replacement cans. These would need to be Black Widow to match the headers, and are only £25 more expensive than a full 4-1 system
Retain symmetry, and easy access to oil filter with 4-2 headers.Option 3: universal cans. There are lots of options that can come in for £25-£50 a can so could get two for less than half the cost of the BW ones. Something like these. Loads of options for different-looking cans. My concern here (other than quality) is link pipes; I really dont want to chop my current BW cans (again, could sell them on) so would need to get them fabricated or by flexi pipe. The massive advantage here is price, leaves me lots of money to spend on other stuff
What I really want to do is have an exhaust system that sounds better, looks good, and is reasonably priced.
So, any thoughts?