The hollow outer tube holds the exhaust lobes while an inner shaft drives the intake lobes.» (mechadyne-int.com)
A forged steel crankshaft with integrated balancing shaft drive, weight - optimized piston and forged conrod contributes to the high level of performance within the engine through reduced frictional coefficients. (cheersandgears.com)
At the rear end, the hollow shaft drove the housing of the center differential, which was flanged directly to the shaft. (ausmotive.com)