yes 2 1/2 o.d. inside the box and carb side,i got a uni clamp on from ebay for $15, and i just got a nice red silicon boot for my cfm to carb adapter, my 34mm took a 2 1/2" x 2 1/4", measure the back o.d. of your carb, they'll have one for it in blue
way nicer lookin than that ugly ass "fernco" plumbing fitting i did have!!!!!
they take paypal and fast shipping too!!!
Intake Pipe Reducer