not cheap thats for sure... With any turbo project, you have to budget for parts, budget for labour and budget for mapping... then add 50% of that budget ontop as thats what it will probabbly come to. - Decompression from 10:1 down to 8.5:1 or 8:1 (depending on the spec your building) - Fabrication of exhust manifold to accomodate the turbo (or belt arrangement and charger housing if using a Super charger) - Engine strengthening... again dependant on power... but i gaurentee that as soon as its built and your running your "mild spec" you wanted... you'll want to up the boost and fueling... this now means you gotta pull it to pieces and uprate the engine internals for stronger bits like forged pistons, arp bolts, stronger conrods and Goodeon pins. - Oil feed and return for turbo - Extra water cooling for engine - Oil cooling for engine - Intercooler mounting/fabrication And Management/Mapping... management can be bought and built, this will cost a little... but mapping...this will be pricey, 99% of people dont have the know how or equipment to do this. I've never even considered it myself due to my financial position... but PLAN, budget, Plan more, Budget even more money and get advice from the tuners/mappers that you will get to map it... Certain tuners only deal with specific management, so they can offer great advice on what works and how they can work with it to get a good turbo conversion mapped nicely.