This ride is getting the Stainless Works full exhaust system. Headers... and full 3" stainless with X, high flow cats, and chambered "mufflers" ... with a single oval style exit in the stock location. We have found with this kit that the front and rear O2 sensors are not long enough for their new locations. I have new style 04 Corvette front O2 sensors on order for the fronts... same sensor and connector just much longer pig tail. I have extensions for the rear O2 sensors... which have the same flat4 style connector as the OLD C5 Corvette front O2 sensors.
This car will still have fully functional front and rear O2 sensors. It remains to be seen if the PCM pops a code or 2 due to the high flow cats. We'll see.
The stock cast iron manifolds have small ball joint style exits. The exits are smaller than a stock C5 cast iron manifold. Yet this engine in either car produces the same rear wheel results. Pretty amazing considering the amount of crimps in the stock GTO exhaust system. BTW, the crimps are there because of the exhaust systems proximity to other parts underneath the car.