The TSX is badge engineered from the CL-series Accord (also known as the European Accord or JDM Accord) sold in Europe, Japan, Australia and New Zealand.
The TSX initially had a restyled interior and different suspension tuning than the European Accord when it was introduced; however since 2008 the interior is now standardized for all three markets. In the Australian & New Zealand, the CL-series is sold as the Accord Euro in the smaller mid-size bracket, where the USDM Accord is sold in the large car category. In North America, the TSX is sold alongside the mid-size luxury Acura TL, which is based on the USDM Accord.
Trend recently published a short but sweet little review on the 2010 Acura TSX 6-Speed Manual. It doesn’t really go too in depth about the transmission but is still a good read if you’re looking for a general overview of the TSX.
Realtime racing prepares a factory TSX to compete in the SCCA Pro Racing World Challenge GTS class. The factory TSX is refashioned to be stiffer and lighter, and includes motor work with raised compression, and a custom built sequential transmission. Acura won the Manufacturer's Championship for the Touring class in 2005 with the RTR TSX, as well as the Driver's Championship for Peter Cunningham. Acura returned in 2006 and won the Manufacturers' Championship of the Speed World Challenge Touring Car class for the second year in a row, running both RSXs and TSXs. TSX drivers finished in 3rd and 4th in the Drivers' Championship. More success followed as Pierre Kleinubing won the Championship in 2007, and Peter Cunningham took it in 2008. Driving for RTR in 2009 is Peter Cunningham, Pierre Kleinubing, Toby Grahovic, Kuno Wittmer, and Jeff Courtney.