Possible Clues:

• It could be on track for a record
• Ferrari, for example
• High-speed vehicle
• Trying to go faster than jaguar in vehicle synonymous with the track
• Formula One auto
• Charging accountant for arithmetic could be pushing the limits on the circuit
• Syndicate accepting bill -- accountant right to get competitive transport
• Going neck-and-neck with accountant registered with Ferrari
• Tracing carburettor part for vehicle often off the road
• For mule, a one that's fast