Take off the exhaust manifolds.

Where can i learn the metric systm? ive always wanted too just school never tought me

The metric system? Increments of 1, instead of fractions.
You don't really "learn" it per se, you just get used to using it.
10mm = 1cm; 100cm = 1 meter (1000mm = 1meter); 1000meters = 1kilometer

deca = 10, hecta = 100, kilo = 1000 (units)

1gram (about the weight of a paperclip) 1000grams = 1 kilogram (often just referred to as a kilo)

Temperature is simple too! 0° = when water freezes; 100° is when water boils.