H-Pipe Replacement on Nismo

Rooskey

I have talked to several exhaust manufacturers and they have stated that alot of them have seen better gains across the board with an exhaust that necks down in the center rather than a straight through 2.5, 3inch, etc exhaust. Everyone explains that it gives you a better average torque to hp range. Like I have said this is what I was told so I asked my friends that work for some Nascar teams (I live near charlotte and mooresville) and they told me that this is how the exhaust is on the race cars they work on. Although you have to keep in mind most race cars run at very high rpms, so with normal street driving it may not make a difference.