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Based on the development on the 981 platform, some enterprising customers have found improvements to their 3.4L 987.2 DFI engines. You will need to independently source a tune to ensure the car runs right.

Technical Description
Using science and engineering to increase performance is what we do. The Dundon 3.4L Intake Runners are no exception. Through careful design of the intake runner geometry we were able to add horsepower and broaden the torque band. Please note: these must be combined with a tune of some kind.