 The high performance Callaway engine with at 5,000 rpm and peak torque of at 3,500 rpm improved the 4.6 HSE acceleration 0-60 mph from 9.7 seconds to 8.6 seconds.The Callaway 4.6 HSE sold for $75,000.The "short block" of the engine is the same as other Land Rover 4.6 HSE models.