The outside diameter (OD) of these exhausts is 1

These high quality petcocks have 1/4" NPT male thread that goes into your gas tank

Enhanced Performance Features

NOTE: The front sprocket in this kit is manufactured by PBI

Off center vent hole

Triumph 650cc Stock Style Header Exhaust Pipes 1963-1970 OEM #70-5957 70-5958 Subcategory_Motorcycle Taillights The outside diameter (OD) ofThese brand new stock style Triumph 650 c. c. motorcycle exhaust pipe headers which have the 1 3 4" flared end to fit over your exhaust spigots and are 1 1 2" OD the rest of the length. These have the tab on each pipe to use the stock type exhaust brackets for easy mounting. Beautiful chrome, these will accept any mufflers for 1 1 2" exhaust pipes. These will fit Triumph 650cc motors 1963 1970. Keep in mind the primary side pipe is lower than the