Thanks for the comments.
The exhaust was a custom setup that we designed with a local exhaust shop. He specialises in making complete systems from scratch for customised cars etc.
We weren't sure if we would like the twin look but we left ourselves with the option of removing the rhs one later if we change our minds, but in the end i think it looks good with two.
The only problem i can see with this setup will be lowering the car (which is planned for the not too distant future after some 19" wheels) as the tips now sit much lower than the bumper.