as much as i want ovals, having paid for the zero's financially its a waste. however, if someone wanted to buy my zero's then i would go for a set of new ovals. alternately, i would love to replace or upgrade to sports cats, or replacing the single centre section, if up graded parts can be made.

i've considered the manufacture of and replacement of the standard parts for better quality stainless steel items as i'm a confident stainless TIG welder have a nice ESAB machine that i rarely use at home, do most at work.

how far you want to go i don't know as less restrictive exhaust manifolds would be great,
another idea of a stainless induction system to replace the rubber set up 75mm tube.