Looking at putting doing an exhaust upgrade for our BA XR6 (non turbo) and our BA XT wagon. What have people used? Did you go all out with extractors too? Not wanting to lose power or use more fuel. No idea what to look at really

On my na xr6 I've just put a xr8 catback on and has the cat removed and replaced with a resonator, sounds ok but I need to tune it though to see if there's any real performance difference