The BMW M3 (E92) is the fourth generation BMW M3 and replaced the E46 M3 in 2007. The E92 is powered by a 4.0 litre V8 engine derived from the V10 engine used by the E63 M6 and E60 M5. It reuses an optimised variant of the E46's limited-slip differential that is capable of 100% lockup. It also had various weight saving techniques applied, including a carbonfiber roof, and introduced a 7-speed M-DCT dual-clutch automatic transmission. In 2010, a limited track-oriented model - the GTS - was produced. In 2011, the E92 received minor exterior updates including LED taillights.