A Gallery of Tailpipe Placement
Left-mounted. A common arrangement, the only practical disadvantage has to do with the fact that the fuel filler door is almost always located on the opposite side of the car from the tailpipe. The configuration makes pulling up to a gas pump a bit trickier for those of us in LHD countries. Many Toyotas, Nissans, BMWs and Mercedes locate their cars’ tailpipes on the left side.
Right-mounted. My favorite arrangement, for the simple reason that when observing a LHD car from the rear, looking through the rear window, the silhouette of the driver’s head is located on the left side of the car. This visual asymmetry is neatly balanced by locating the tailpipe on the right side, under the rear bumper. Mazda particularly seems to favor this setup.
Dual. Once confined to exotics and high-end sports cars, the dual tailpipe arrangement has trickled down into every car category, from luxury SUVs to hot hatches. Its ubiquity has diluted much of its visual impact, and now dual tailpipes seem rather cliche and unoriginal, especially when added to cars with transverse or inline engines, where there isn’t a direct correspondence between a longitudinal, V- or flat-engine’s cylinder bank and one tailpipe side.
Center-low-mounted. The Porsche Boxster (shown above) and Cayman, along with Mini’s performance line, among others, feature the center-low-mounted tailpipe setup. Advantages include perfect visual symmetry (so long as the driver isn’t in the car); a downside is the tendency for the arrangment to make the rear of the car look taller and narrower than it is—and most performance cars would prefer to project a lower, wider image.
Center-high-mounted. So far, this layout has only appeared on high-end exotics like the McLaren MP4-12C (above) and Pagani Zonda. A full-width, perfectly-optimized rear diffuser can be developed for these cars without having to work around tailpipes. The weight of the muffler(s) and tailpipes does have to be mounted higher in the chassis, though, raising the CG somewhat, and any risks to passers-by from a thigh- vs ankle-level exhaust outlet have yet to be assessed.
Whatever. Vintage BMWs (among others) make me smile. Featured most prominently on cars such as the classic 2002 and E24 6-series, in that golden era BMW obviously had higher priorities than tucking their cars’ tailpipes neatly into one particular corner of the bumper. The slightly off-center layout says “I don’t really care where the exhaust comes out; I’ve got bigger fish to fry development-wise, like perfecting the suspension design and harmonizing all the controls.” I love it.