Honda Acura NSX 1991 Service Manual page 45

Construction and Function
Outline .......................................... 5-2
Variable Valve Timing and Lift
Electronic Control System (VTEC) ... 5 - 4
Cylinder Head ................................ 5-9
Lubrication System ......................... 5-11
Exhaust System ............................. 5 - 1 3
Cooling ......................................... 5 - 1 4