Try the Shell service centre at Seksyen 5 which is next to the EPF building. The mechanic charges at reasonable prices. If you happen to go there try to ask for Hisham (017-3379447).
For general servicing and repairing , you might consider JC Auto @ at the other end of Hilton KFC there ... they are the Bridgestone Pro workshop and fast services as they got 5 men in that place
The Ferrari 458 Italia has been getting rave reviews for its handling from the motoring press, so add in a sprinkling of some Maranello magic for the track-focused...