Product Details:
       
        Bill B BBR Filters Velocity Stack Filters  3.25 / 85x12mm Black (Fits both stacks)
        
        YES THEY ARE attached in the center -  fits full radius TWM Borla stacks - 3.25 /85mmx12mm measure across the top rim - BillBees BBR Filters
        
        
Product Application:
        Applications: 
        
        
Manufacturer Info:
        Manufacturer/Distributor : BBR Filters
        Manufacturer Part Number : CUSF85x12
        About BBR Filters : 
        
        Product Specifications:
        Weight: 0.40 lbs.
        Height:
        Length:
        Width:
        Reference Number: 427.CUSF85x12.2
        
        
        
        Check with your local emission laws before ordering