The 2ZR is NOISY and it has a habit of destroying the catalyser when used on track/race use.
The new 2bular 4-1 manifold releases some serious power and torque gains. The chambered design of Silenced De-Cat Pipe (SDCP) means there's no packing materials to burn/blow out and it helps keep you under the db limits. Your OEM Catalyser can sit safely in the garage.
Supplied with the Lambda wiring extension and the OEM gasket between cylinder head and manifold.