what size would the clamp have to be 4 3/4" or 5"

 

measure the inside diameter of the v-band flange.

 

i dont have the flange thats why i wanna know what size vband flange i need

 

i know. your picture shows you are measuring the outside diameter of the flange. you need to measure the inside diameter of the flange. the size flange you need to purchase will be the size of pipe that fits into the flange. ex. my 2.5 v band flange fits a 2.5 pipe but the outside diameter of the flange is ~ 3 inches.

it looks like the inside diameter is 3.5 inches so you will need a 3.5 inch v-band clamp. thats a larger turbo. what are you going to put it on?

 

https://www.homemadeturbo.com/f7/som...entify-117049/

theres better piks on the link above thats my turbo oh and i wanna put it on my b16

 

measure the inside diameter of the flange on the turbo. when you get that measurement let me know.

 

and the vband goes on the center onf the turbo also

 

bump

 

its 4.5"

 

Due to the 11 digit part numbers, I would assume it is a KKK turbo. Your best bet to identify it is calling around some turbo rebuilders and giving them the numbers to see if they can cross-reference them to give you more info. You don't want to slap that thing on without knowing what it is. They would also be able to tell you which clamp to get, if you can't figure it out.