TVC0021 is a crossflow charge air cooler for the Volvo WG.
The core measures 34.25" high by 26.25" wide, 1.9375" deep. It has a 4" inlet at the left and a 4" outlet at the right. There is no integral oil cooler and no filler neck.
It replaces 50 OEM and aftermarket numbers, among them VOL18811, VOL18811N, VOL18811ED. Searching any one of them will find this part.
On charge air coolers the inlet and outlet positions and the boot diameters matter as much as the core. A cooler that fits the opening but presents its connections on the wrong side will not plumb up.