I have the Litchfield stage 1 and very impressed and would highly recommend; I don’t have any anything to compare against such as the 375, but its massive difference to standard.
They fitted it for me at their premises with the hansdset loaded with the OTS COBB Maps and then loaded the Litchfield Stage 1 and then a short test drive. It was 690 fitted with the handset and maps loaded and flashed and test drive to check all was good
http://www.litchfieldmotors.com/ford/focus-rs
I had some questions about if I wanted to add more hardware and Ian Litchfield got back to me straight away in person. Will be back for stage 2 soon 🙂