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https://savagecadillac.com/collections/ct5-v-lighting

Gulfcoast is the way to go. The world's quickest CT5 BW is running a Gulfcoast CF driveshaft.

The OEM wing is held on with double sided tape. You will need to use a piece of fishing line to remove it. There are posts about it here and on videos on Youtube. The AC wing will mount to the trunk with 4 bolts after you remove the liner. This video should help.

Not at all. Very easy.

ARH are fantastic, they have always been top quality.

You can get an aftermarket 19" forged aluminum wheel that weighs right at 20lbs, Apex is one example, a similar magnesium wheel is about 17lbs.

Problem with magnesium is that they're only 2-3lbs lighter than a good forged aluminum wheel, and they're more brittle so its possible to crack them, and they typically cost a good bit more than forged aluminum.

Haven't heard the full ARH system.

Thats the quietest design if you want to add headers. It will still be noticeably louder but not obnoxious.

It will be raspy and obnoxious and WOT

Not yet. I will at the oil change which is when I typically empty a catch can. No idea how its routed, Vengeance Racing installed it.

If you're a track fanatic, then lighter wheels might make good sense but I would also argue adding 50hp more would give WAY more benefit for MUCH less cost unless you're still under warranty and trying to retain your warranty, but then again, track sessions could void that anyway.

The compound and design of the tire will absolutely have more impact on what you're feeling than a few lbs per wheel/tire combo. I'm not saying that lighter wheels don't matter, I'm simply saying the difference is so minimal that most people would never notice unless they were measuring it with...

There's the difference. Two totally different tire compounds.

Same tires?

Thats a different change though, you went from 19" wheels to 20" wheels which can be quite noticeable, especially if the sidewall changed at all.

I swapped the OEM wheels on my 2020 Shelby GT500 to aftermarket Signature forged wheels, saved 10lbs per corner and I couldn't tell a bit of difference. Luckily I did it for the look rather than the performance. There's a good Youtube video showing the differences in multiple wheel weights and...

Slightly different because its unsprung weight, but honestly, I still can't see it mattering at all. I know lots of Shelby GT500 CFTP owners that have switched their 17lb carbon fiber wheels for aftermarket aluminum wheels which typically weigh around 24lbs each and none of them are reporting...

It's not going to affect anything.

And still no CT5-V Blackwing exhaust available. I got tired of waiting and bought Corsa yesterday.