Replaces Volvo 875848-4 or older 876631-3. 

Designed to fit the following models: AQ200, 250, 270, 275, 280, 280DP, 290, 290DP.

The inside diameter of  one end is approximately 3" and the other is 3 3/8".  It is about 6" long

Cross reference: Sierra 18-2758