We are Common Rail Diesel Specialists (CRD Performance) based in Bolton, Lancashire, offering Quantum Tuning engine remapping in the North West of England, and very close to Manchester city centre, situated just outside the M60 Ring road. We are near to Liverpool, Warrington, St Helens, Preston, Blackpool, Chorley, Burnley, Bury, Blackburn, Rochdale, Oldham and Stockport. We offer a mobile engine tuning re-map service to fleet users within a 25 mile radius of Bolton, subject to a minimum number of company vehicles.