API actually done the engine, however looks like they are now gone, however I think Mark is competent, he also gives a 6 month warranty with the build and only charges £350 for mapping. He fitted the MD321T and Injectors, great service. He is also a one man band, which is good as it means no dodgy apprentice will be on it, it will be build by him. He had a few builds in, and is used to building 700bhp time attack cars, plus he does freelance work for Subaru uk, looks like a really professional set up. It will take three trips, one to drop off, one to get car for run in, one for final map. I would give him a call if I were you, as he is really fair with his pricing. When are you thinking about getting it done confused?