Filtering JSON by object property value
It would seem that a simple optimization would be to do it in a single step, i.e. something like:

var finalPassArray = [];
for(var key in _self.productList)
{
    finalPassArray.push(_self.turnoverMonthlyData.filter(function (el) {
        return el.product == _self.productList[key].product;
    }).map( function(el) {{ el.ordered } ) )
}


But I would be tempted to use something like reduce:

var results = _self.turnoverMonthlyData.reduce( function(list, el) {
                if (!list[el.product]) list[el.product] = [];
                list[el.product].push(el.ordered);
                return list; 
              }, {} );


Which I tweaked slightly to give results as:

{ T0000001_: [48,264,24,67,54],
  T0000002_ :[4567,511,24,18,5],
  T0000003_: [4,57,6,11,544], 
  ...


which might be easier to work with.