i have an b18b with an turbonetics turbo kit on it and i have a 3 inch straight back all the way to the back bumper but i was thinking about buying the hks hi power exhaust does any one know if its 3 inch or 2.5 inch and it doesnt say catback or turbo back??if you have any info please lmk

 

The hks exhaust Piping Diameter: 55mm

My advice is that you have an exhaust system custom made using what ever muffler you want with mandrel stainless or aluminum piping...