Invidia N1 Single Exit Cat Back Exhaust - OPEN BOXOPEN BOX SPECIAL TEST FITTED BUT NOT DRIVEN. SMALL DENT AND SCRATCHES ON TIP SEE PHOTOS ABOVE INVIDIA N1 CAT BACK EXHAUST Full power. Full flow. Full volume. Blending performance and price, the Invidia N1 Exhaust is a modern interpretation of the classic N1 racing style exhaust. Invidia N1 Exhaust Systems feature cannon style mufflers for maximum flow and minimised back pressure, resulting in significant mid to top end power gains. From start to