After Extensive testing, we know this is the best!!
The increased diameter and flow capacity improves exhaust efficiency whilst reducing secondary exhaust pressure. The Version 2 was developed to cope with the demands of advanced 4G63 tuning.
In addition, the 74% overall weight reduction improves the vehicle’s responsiveness.
It is commonly believed that performance efficiency can be improved by reducing the secondary exhaust pressure from the turbine. The torque will be affected when the pipes diameter is too wide.
Tomei had invested over a year in researching all possible aspects and combinations for the best performance gain throughout the entire area. The end result was a decrease in exhaust resistance in all areas and best results is achieved with our Outlet (dump pipe) and front pipe as a combined set.