I honestly have one on the quad I just bought , recently with a 2 into 1 pipe it’s not as bad as everybody says.it still has a lil punch in the mid power,it’s not peaky pretty smooth and it is certainly better than stock pipes idc what they say they also still rev higher so you gain some more over rev more than stock Pipes so top end increase is there but nothing crazy.also the sound is so unique I could hear it all day long definitely one if the louder pipes I’ve heared.