The Aeroflow Performance T28 to T3 adapter plates are laser cut with a CNC machined taper for a uniform transition to the smaller inlet size. This is a two-plate adapter can be used both ways. This allows the user to bolt a T3 turbo to a T25/T28 turbo manifold flange or bolt a T25/T28 turbo to a T3 turbo manifold flange. Made from stainless steel to withstand the extreme temperatures form the turbo and turbo manifold.