Thought the kit was 1200 to be honest
Is it worth the bhp in diesels or better off going petrol route?
They tune differently to petrols, well, they PD engines do. You will see far more torque from a diesel but not as much BHP.
Diesels I think are more expensive to tune.
Darkside to a drive in drive out budget turbo kit, £1600 for ~230 BHP.