I replaced a set of 14 inch case Thrush Hush turbos, which neck down to 2.5 or 2.25 inside, with 20 inch case Ultra Flos.

3 inch pipes, dumped at the axles, the longer Ultra Flos are quiter at idle, quieter at cruise, way less drone. Run the longest case you can.

Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street