Proflow Exhaust X Pipe, Universal, 304 Stainless Steel, Natural, Aluminized, 3.000 in. Inlet/Outlet, 18.00 in. Long - PFEXP030Part Number: PFEXP030 These X pipes work like conventional H pipe balance tubes, but give your vehicle better performance by increasing exhaust scavenging and balancing exhaust pulses. They also increase exhaust gas velocity to create a venturi effect which helps to evacuate exhaust gases even quicker.