5Zigen Dowpipes Nissan R35 GTR 09+

These are made of lightweight stainless steel and have provisions for both stock oxygen sensors. They remove the stock primary catalytic converters, thus allowing MUCH better exhaust flow and sound. These are not emission legal and are for off-road use only. Most manufacturers use 75mm piping, but 5Zigen has stepped it up a bit with their 80mm piping.

About Manufacturer: 5Zigen

5ZIGEN Performance Products

Worldwide distribution and product quality is an essential part of 5ZIGEN business ethics. We, 5ZIGEN produce not only exhaust systems and wheels, however, also many automobile related accessories as well. 5ZIGEN's has one of the greatest research platform from racing, so they can gather the upmost techological data and apply it to their end-products. ISO9001 certification guarantees that our products are kept in upmost of quality control.