You knocked it out of the park with those rotors and Brembo brakes. My wife and I have an '09 GT with the GXP rear diffuser that I installed after we got the car. Also I know the exact front lip that you're talking about. EZ lip. I'm going to install ours on the front and use some self tapping screws. I had a muffler shop do a Borla catback system with the larger single tips. I do love the quad tips that come from the factory. One day I may switch the tips back to a quad. Your cold air intake is awesome and actually a true cold air. Like you, we are the 2nd owners. I opted for the VCM otr ram air intake system. I installed that myself as well. Other than that the car is pretty much stock. I did use a tuner device to deactivate AFM/DOD. I am going to install new rotors soon, but mine were supposed to be silver like yours, but Summit sent me a lighter gray colored set of rotors. SMH. I may reach out to them and get the silver ones. We're still rocking the factory rims, but I love yours. Do you have Active fuel management/Displacement on demand still active on your G8? Eventually we will have to get the lifters swapped out to do it right. Ours had 47K original miles when I drove it home Memorial Day of 2021. She now has 61K miles on her. Love it love it love it. Such underappreciated cars. Too bad GM killed the Pontiac line.
Hey, I apologize for getting back to you late. Wow 61000 miles it’s nothing. I agree with you that these cars are under appreciated, and usually are not well treated. To answer your question, I completely removed the DOD, this was done when the performance shop (LSX by 360 Performance shop) installed a Texas Speed stage 2 cam with a whole bunch of other goodies.
Brother we have nearky the same exact car. Lol. Minus a few differences of course. Same wheels, same color, different interior, ours doesnt have a sunroof yet but it is getting starlights here very soon, has long tubes, 3200 stall, TSP 224R cam, tuned, tinted windows, etc...
If you just use the CTS brakes then it will all work fine and you will have upgraded rotors, calipers, pads and lines all the way around. No need to drill out anything. About $700 for everything.
