Right have decided to bite the bullet and do the turbo replacement properly, instead of looking for cheap options..... I have the 4 options from scroll: K03-SP51R $550 K03-SP51X $650 K04-SP51X $750 K04-SP56R $900 I have the address to send my old unit to, just need to decide what spec. What other mods need doing to accommodate the above upgrades? Ill be fitting a FMIC regardless, just dont know what else will need sorting prior to getting it running. Thanks in advance.