I have the Librands replacement manifold and cat and it makes a noticeable, positive, difference. I have retained the standard silencer as Rob, Librands, said that the only difference fitting the Librands 'silencer' would make would be to increase the noise but not power.
Don't know what effect a replacement silencer would have on a car with the standard manifold and cat but other than more noise I suspect not a lot.
That's good to know.
I quite like the sound of my standard system, and I wouldn't say it's particularly quite, but like the idea of a bit more go. It's just a shame the Librand's manifold and cat are so expensive
