The engine in the Cat 320D
On the Cat 320D, the Cat C6.6 is a 6.6L / 403 cu in 6-cyl inline diesel with a 105 x 127 mm bore and stroke, rated around @ 2200 rpm, built to Tier 3/4 emissions. If you are replacing the engine in a Cat 320D, this is the unit to match. Call with your engine serial number and we will confirm the exact fit before you buy.