Hi anthony, welcome on board
Having been an owner for nearly 5 years now I must say the cars are very reasonsble to maintain. Although I dont do a great deal of driving in the zed (20,000miles in 5 years)
All I've had to do us every year give is s full service and change all fluids etc, the only thing I have needed to replace was a starter motor oh and drivers window motor, not bad for 5 years ownership
The stock engine can handle 400-450 bhp , but it is all in the tuning and mapping and only a select few are trusted with this job , mark at abbey being one
As the others say once you have driven the zed you not have the urge for more power straight away as it puts a smile in your face, well it does mine anyway :-)
Just before I decided to sell I had bought vortech super charger and all other bits I was going to need , from memory it a cost me £5k but most were second hand parts. Add another £1.5k for fitting , mapping and the uprev license and you start to get an idea of costs
Not to mention you will need to seriously consider upgrade g your brakes to a bigger spec and also wheels and tyres to wider ones to get the power down
Hope this helps mate
Paul