Aftercooler for internal combustion engine

An aftercooler for cooling a charge air of an internal combustion engine, the aftercooler comprising:

• a first header plate;
• a core assembly positioned adjacent the first header plate, the core assembly comprising:
• a plurality of tubes coupled to the first header plate;
• a plurality of rows of fins, wherein one or more of the plurality of rows of fins includes a first fin receiving some of the plurality of tubes;
• and a second fin receiving further of the plurality of tubes, wherein the first fin has a first end and the second fin has a second end, wherein the first end forms a joint with the second end.

A method of assembling an aftercooler of an internal combustion engine comprising:

• providing a first header plate;
• coupling a plurality of tubes to the first header plate;
• coupling a first number of the plurality of tubes to a first plurality of fins;
• coupling a second number of the plurality of tubes to a second plurality of fins;
• and
• arranging a respective first end of one or more of the first plurality of fins to interface with a respective second end of one or more of the second plurality of fins.