This is a 14-bolt, 153-tooth flywheel assembly built for Volvo D13 and Mack MP8 engines running a 15.5″ clutch. It is designed as a direct replacement for Volvo 21514067, matching the bolt pattern and tooth count needed for correct clutch and starter engagement on these applications.Interchanges:Volvo 21514067WA905-10-4169Features14-bolt mounting pattern153-tooth flywheelSized for 15.5″ clutch applicationsFits Volvo D13 and Mack MP8 enginesReplaces Volvo 21514067Tech SpecsBolt pattern: 14-boltTooth count: 153TClutch size: 15.5″