Simply because the first valve opening at 1300~1500rpm.These kinds of an early opening time is simple to generate disturbances a result of the increased pipe diameter and significant movement structure to resonance. Renntech downpipes are intended for Motorsport programs on shut circuit racetracks only or for export. They don't seem to be intend

Simply because the original valve opening at 1300~1500rpm.This sort of an early opening time is not difficult to make disturbances due to the elevated pipe diameter and higher movement design to resonance. All general performance modifications and installations are at The shopper’s personal hazard. Weistec Engineering retains no responsibility