Hi I'm looking for guidence from anyone with experience and knowledge about upgrading my S3 with high mileage. here are the facts: 150K miles Mostly motorway Always serviced when indicated either by Audi or VAG specialist. No current issues. I'm looking to turn it into a project and spend some dosh on it... considernig doing the following over time: Performance upgrade by ECU reprogramming (engine control unit remapping) Forge upgraded dump valve Performance air filter Exhaust system from catalyst back (milltek) Bigger turbo Intercooler High pressure fuel pump EBC discs n pads, Sachs suspension 19' rims Is it worth it for a car with so many miles? Am I going to blow it up? Should I look to repolace the engine internals to cope with the upgrades? Spoke to various specialists and I'm getting mixed messages. Some say car will be fine, some say don't bother, and invest dosh in newer car then possibly upgrade... Any help greatly appreciated.