The 997 turbo ipd "y" pipe was built for the more demanding turbo performance customer. The factory y pipe becomes restrictive when adding substantial power gains. The ipd "y" pipe has larger inlets and an optimized diversion area allowing for even greater power gains. This superior and more efficient design flows 126 more cfm than the factory y pipe delivering the additional power needed to raise the performance bar on any turbo. The ipd "y" y pipe is designed to be a direct replacement of the factory OEM y pipe. There are no modifications or fabrication required for installing the ipd y pipe. This is an easy and straight forward r & r (remove and reinstall) bolt on upgrade. Note: contains everything nec...(choose a part on the right to read more)