The new model is based on the BMW F12/F13 and shares its 7-speed M-DCT gearbox, BMW S63 V8 engine and other technology with the BMW M5 (F10). The M6 coupé has a carbon-fiber roof and other weight saving measures, making it 20 kg (44 lb) lighter than the M5, however it is 140 kg (309 lb) heavier than the previous M6. The M6 convertible is 50 kg (110 lb) heavier than the previous M6 Convertible.