Input (grade 13): A V12 with two banks of six cylinders angled at 60 Â or 180 Â from each other has even firing with power pulses delivered twice as often per revolution as a straight-6.
Output (grade 7): A V12 angled at 45 Â, 60 Â, 120 Â, or 180 Â from each other has even firing and is smoother than a straight-6.