There is a lot of power held back by the factory exhaust system on the Nissan GT-R. By eliminating the factory catalytic converters, STILLEN has successfully improved flow, creating power gains as well as dramatically improving sound. Catalytic converters are not only very restrictive to the exhaust flow and performance, but they also act as mufflers, greatly reducing the sound that enthusiasts desire.
This Secondary Cat-Delete Y-Pipe System is TIG welded and constructed out of polished 304 stainless steel with laser-cut and CNC machined 304 stainless steel flanges. The resonators themselves are also TIG welded, polished 304 stainless steel.
To allow the exhaust system to flex with the movement of the engine, yet stand up to the heat and flames coming off of the turbos, we have used nothing but the best turbo specific flex joints on this application. Under hard driving, flames will travel through the exhaust system, and only turbo specific flex joints will stand up to the heat generated in those circumstances.