If you want the option in the future to run more power you can witha Rotrex. The chargers alone though are £2000. The minimum I have seen run is 10PSI which was about 310bhp. You will need in addition to the kit either a charge/intercooler or water injection. You can run standard internals but the first thing to go will be the headgasket. I would also recommend ARP headstuds. You can buy 100,90,80,75,70 and even 68mm pulleys. However you can probably get anything machined for your needs. After 10-12PSI its forged pistons etc and loads more money. The headgasket on mine started to leak after r