i need a set of exhaust flanges/colletor rings (3 bolt) type that can accept up to a 6 inch exhaust. i want to step my superduty exhaust down to 4 inch so that i can bolt on the stock cat. anyone know where i can get these parts. or can anyone cut me out some?

this is what i am looking for. but it needs to be big enought to accept a 6 inch exhaust pipe. My truck has a 5 inch pipe jimmys has 6 i would like to make the adapters so we can use them on both trucks.

so i need to get
2 witha 4 inch hole
4 with a 5 inch hole
and 4 with a 6 inch hole i should be able to make removable test pipes for jimmy and my trucks.

Not a promlem, give me a call  559-903-5456