Most iPod docks make an effort at speaker separation for true stereo sound but, truth is, you're not going to get much physical separation of speakers in a 12-inch-wide chassis.
On a more practical level, the 620S uses Caterham's wider chassis to give you more space for things like a passenger, luggage and a usefully sized fuel tank.
But some drive souped-up models that offer custom-built engines, wider chassis, streamlined aerodynamics and open grills and even rear-view cameras to aid speed and agility.
Blundell was standing in for regular driver Nigel Mansell in the second McLaren until the team could produce a wider chassis in which to accommodate him, as the car's initial cockpit design had proved to be too narrow for him to drive comfortably.
The Bolt makes a striking first impression with its 3.6" wide metal chassis, designed entirely in-house by Digital Storm's engineering team.
The Concept gets a wider, longer chassis, race suspension and wheels, Brembo brakes, a racing cockpit and an engine tuned for touring-car racing (about 500 horsepower!).
Built on a wider VW Beetle chassis, the Karmann Ghia took its name from the German coachbuilder that assembled it and the Italian design company that shaped its pretty lines.
The prototype is barely 15cm thick, although it is as long and wide as a conventional chassis.
For sweeping turns, as well, this is a very enjoyable chassis, with the wide, 225-series tires doing a good job of biting hard in sharper curves and the stability control halting torque steer but not playing safety cop too often to spoil the fun.
These need to be longer than your chassis plank is wide, plus enough to allow the wheels to turn about 30 degrees in either direction.
Metaldyne gives Asahi Tec a wider range of engine and chassis parts in the United States, the world's largest auto market.
