Looking the the engine from the rear, Number 6 cylinder is the one furthest towards tot front of the car on the right hand side.
996 has 6
Porsche H6 means Porsche Flat-6 Cylinder Engine
996
166
166
6 cylinder boxer (flat) engine
4 cylinder 1,4,3,2 6 cylinder 1,6,2,4,3,5 8 cylinder 1, 8, 4, 3, 6, 5, 7, 2 (not certain) this is for a Chrysler V8
It is 6*Int(999/6) = 6*int(166.5) = 6*166 = 996
The two tens, on either side of 996 are 990 and 1000. 996 - 990 = 6 so 996 is 6 away from the lower ten. 1000 - 996 = 4 so 996 is 4 away from the higher ten. Since 4 is less than 6, 1000 is the nearer ten.
A 3.6 Liter Single overhead cam 6 cylinder.
cylinder # 1 is the front cylinder on your straight 6
It is: 166*6 = 996