These guys know what they're doing... you get a sense of that when you walk into the office and see "track profiles" as wall decoration... any car that goes out on the track - to be raced - has to be well-prepared. And you get a further sense of the capabilities when you look at some of the car in for service there. I won a 1963 Porsche 356 B (with a 1964 Porsche SC engine/two two-barrel Weber carbs) and that is not an easy car to "tune." They do well with it. But I look at some of the other Porsches they have in there... makes mine look insignificant. And then there are the profusion of BMW's you'll find in there. But they have a lot of "daily drivers" in - they seem to be well-versed in almost any type of car. (The other day I saw a beautifully-restored Fiat 124 Convertible in there... if I'm remembering the number of the Fiat correctly, most certainly I'm remembering this Make/Body Designer - Pinnifarina. Looks like a baby Ferrari convertible from the early 1960's.) This place was even able to get my 1986 Saab Turbo "Three-Door" running well... the Swedish car specialist shop here where I live (metro Boston-Northwest) kept failing miserably. (This Turbo is unusual in that it is not a convertible... many 1986 Saab Turbo convertibles survive, because they've been used only in the summertime. My Turbo has "never seen snow" and the paint is original... so you can imagine how possessive I am with it.) The H M Motor Works team seems to be able to keep it running like a clock. In summary, I see lots of BMW's in there... but lots of other makes. If you have any further questions, I've given them permission to a serious prospective-customer.