Originally Posted by 156_TSpark_Boy
Hmmm interesting one, I've never really looked into diesel engine but I dont see why not, its basically the same engine. A freeflowing exhaust system should increase bhp in a diesel, only thing will be the noise.
Most of the noise from a diesel normally comes from the front (noisy engine) and not having heard a diesel with a sports exhaust I couldn't comment on what it would sound like.
Its hard to make a noisy exhaust on a diesel. Even without a cat and centre silencer, it won't be much noisier than your typical backbox-only petrol noise. This is because the turbo smooths out the airflow, less 'waves' to make the sound in the exhaust.
Even without a backbox its not massively loud -
http://www.youtube.com/watch?v=HDl4S0B_JlE