Thanks for the replies and confirmation on the 2.5 inch I-pipe. That sounds great regarding the production exhaust and it indeed sounds GREAT
too - Ha! I knew about the pre-production catback being made by Corsa as well and I gotta say - the actual stock setup seems to be a mirror image of the pics I have seen of the pre-production GXP. That combined with the terrific stock sound - especially on WOT runs, sure makes me think it could actually be Corsa hardware. That would definitely be a nice touch by GM and Pontiac. When I do get under the car, I will look it all over very closely to see if there is anything that might indicate that it was made by Corsa.
Sorry to hear of your DMV issues Venom. I don't know any further details if they were posted - but good luck in getting things cleared up.
And let me clarify once again, that I planning to mount my cutout just ahead of the Y to the mufflers in the REAR of the vehicle. A cutout can be placed in a number of locations with minimal sacrifice of gains depending on the application. For a purely strip car - many place the cutout right after the header collector - for a street car though, depending on how the exhaust is setup and whether the computer programming has been edited or not - you will want to mount the cutout AFTER the converter(*). Once that decision is made, you might as well try to mount the cutout as far back in the exhaust system as possible while still being placed ahead of the muffler(*). This will greatly reduce interior noise and vibration as well keep hot exhaust gases from being dumped under the belly of the car and possibly affecting the floorpan, fuel and brake lines, electical wiring or connectors, or even suspension pieces. I may need to use a small portion of exhaust tubing off of the cutout to direct the exhaust gases fully under the rear suspension. This mod is about the last thing on my to do list for the GXP right now though - so it will be a little ways down the road. But for a heads up to anyone else interested, there is a supplier on eB** that offers the QTP Electric Cutout + QTP Stainless Steel Cutout as a package in various sizes at a discounted price.
But I will be sure to have pics available when I get this put together!