From what I've been able to gather, it looks like the CT4-V intake is better than the ATS-V intake. If I had to guess, the ATS-V intake was conventionally located on the front corner because the early ATS-V development models included an LT4 engine. For the CT4-V, engineers were run through a gauntlet to reduce power losses, and the dual symmetrical plumbing is what they came up with. It's right out of the ATS-VR program.
I've been going cross-eyed looking at pictures of the engines and support structure, and I'm pretty sure that all the CT4-V parts can be transferred from to the ATS-V. I've been able to locate most of it:
1. CT4-V vs. ATS-V intake pages for comparison:
Air Intake for 2023 Cadillac CT4 | GMPartsDirect.com
Air Intake for 2018 Cadillac ATS | GMPartsDirect.com
The issues I'm trying to come through are:
1) Should we keep the ATS-V 15865791 and 23262344 mass air flow sensors or swap out for the 12714453? I can't locate the right sensor.
2) I can't determine if the CT4-V has a MAP sensor equivalent to the 12653415 on the ATS-V.
I'm not 100% on the parts quantities, but it's a minimum of $632 for the above parts--probably closer to $725 once we get the quantities right and the missing pieces accounted for.
84867721 (x1) + 23184138 (qty unknown) + 13384034 (qty unknown) + 84335354 (x2) + 12714453 (qty unknown--may be able to use ATS-V MAFs) + 84938253 (x1) + 84829907 (x1) + 11609530 (qty unknown) + 84435230 (x1) + 11588712 (qty unknown) + 84107707 (x1) + 23414205 (x1) + 11589290 (qty unknown) + 12668054 (not required--identical to ATS-V) + 12638542 (x1) + 12670013 (x1) = $632
2. Side covers on this page (these would be an ideal candidate for CF wrapping, btw):
Covers & Shields for 2022 Cadillac CT4 | GMPartsDirect.com
84861317 (x1) + 84861318 (x1) + 11589289 (x4) + two ID# 4, 5, & 6 push-pins and metal clips = $81
Probably $100 when you get the other hardware.
3. Splash shields:
Splash Shields for 2022 Cadillac CT4 | GMPartsDirect.com
This is where I'm gonna have to dig some more. I believe that only ID #1-4 are required. I want to check out the lower deflector (which supports strakes) because I'm already doing the Blackwing brake ducts on the ATS-V.
![Image]()
4. Forward diagonal braces (unknown P/N):
Confirmed to overlap on top of the rear diagonal braces (rear braces are the same P/N on ATS-V and CT4-V). However I can't find the part number for these yet. I've checked every category on GMP and cannot locate these yet. I also want to see how they bolt to the front radiator support--not sure if we have the bolt holes. If someone can help locate these (red boxes in the picture above) that would be awesome.
I've been going cross-eyed looking at pictures of the engines and support structure, and I'm pretty sure that all the CT4-V parts can be transferred from to the ATS-V. I've been able to locate most of it:
1. CT4-V vs. ATS-V intake pages for comparison:
Air Intake for 2023 Cadillac CT4 | GMPartsDirect.com
Air Intake for 2018 Cadillac ATS | GMPartsDirect.com
The issues I'm trying to come through are:
1) Should we keep the ATS-V 15865791 and 23262344 mass air flow sensors or swap out for the 12714453? I can't locate the right sensor.
2) I can't determine if the CT4-V has a MAP sensor equivalent to the 12653415 on the ATS-V.
I'm not 100% on the parts quantities, but it's a minimum of $632 for the above parts--probably closer to $725 once we get the quantities right and the missing pieces accounted for.
84867721 (x1) + 23184138 (qty unknown) + 13384034 (qty unknown) + 84335354 (x2) + 12714453 (qty unknown--may be able to use ATS-V MAFs) + 84938253 (x1) + 84829907 (x1) + 11609530 (qty unknown) + 84435230 (x1) + 11588712 (qty unknown) + 84107707 (x1) + 23414205 (x1) + 11589290 (qty unknown) + 12668054 (not required--identical to ATS-V) + 12638542 (x1) + 12670013 (x1) = $632
2. Side covers on this page (these would be an ideal candidate for CF wrapping, btw):
Covers & Shields for 2022 Cadillac CT4 | GMPartsDirect.com
84861317 (x1) + 84861318 (x1) + 11589289 (x4) + two ID# 4, 5, & 6 push-pins and metal clips = $81
Probably $100 when you get the other hardware.
3. Splash shields:
Splash Shields for 2022 Cadillac CT4 | GMPartsDirect.com
This is where I'm gonna have to dig some more. I believe that only ID #1-4 are required. I want to check out the lower deflector (which supports strakes) because I'm already doing the Blackwing brake ducts on the ATS-V.
4. Forward diagonal braces (unknown P/N):
Confirmed to overlap on top of the rear diagonal braces (rear braces are the same P/N on ATS-V and CT4-V). However I can't find the part number for these yet. I've checked every category on GMP and cannot locate these yet. I also want to see how they bolt to the front radiator support--not sure if we have the bolt holes. If someone can help locate these (red boxes in the picture above) that would be awesome.
