The size of the housing is 1-1/2" diameter by 1-1/16" long

These clutch plates fit pre unit and unit Triumph and BSA motorcycles

Fits H-D Big Twin & comparable S&S front motor mount bolt patterns CNC'ed billet 6061 T-6 aluminum construction Designed to install Lowbrow FiltroMax Remote Oil Filter (sold separately) between down tubes on custom motorcycles See Related Products below for the Filtromax Remote Oil Filter

This is the perfect tool set to make assembly go easier by chasing your threads

Cycle Standard motorcycle exhaust tubing is 1

#BHC-801 8-32 x 5/8 inch Length Chrome Button Head Allen Bolt - 10 Pack Brand_OLD-STF Cycle The size of the housing#BHC 801 8 32 x 5 8 inch Length Chrome Button Head Allen Bolt 10 Pack. Made in Ohio, USA.