dc2 sard cat?

[ryuhou]

hey guys how come the sard cat for dc2r is bolt on when its 76 in and 60mm out
B18C 5MT 99.7～01.7 76 60

im proli n00b but 76mm in doesnt equal 2.5inch ?

[90LAN]

donut flange size ?

[ryuhou]

not sure its not mentioned anywhere