I have a full Z06 exhaust that was on my 05 for sale. Manifolds on back to the NPP. The NPP mufflers will be coming off early spring. I added headers, x-pipe, and just bought B&B Fusion. If you have a stock 05 and just wanted to use the NPP, a muffler shop can easily adapt that to the 3". Would like to sell all complete, $575 OBO picked up. If you prefer to call, ph.563-920-2273. All in excellent condition. Located in Cedar Rapids.