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Description
About the Cadillac CT6 Engine
This is a used 4.2 liter twin turbocharged V8, the high output engine that powered the top Cadillac CT6 trims. It pairs strong power with direct injection and twin turbos for quick, smooth response. A complete tested long block like this restores full power when the original engine is worn, knocking, or damaged.
Important: the 4.2 twin turbo V8 was a rare engine fitted only to the CT6 Platinum and the CT6-V for roughly the 2019 to 2020 model years. Most CT6 cars used a smaller four or six cylinder engine. Before you order, confirm your CT6 actually has the 4.2 V8 by checking the engine code or VIN.
What We Inspect
| Item | Details |
|---|---|
| Long Block | Sound block, heads, and external condition. |
| Leaks | No major leaks at the visible seals and gaskets. |
| Compression | Results available on request before you pay. |
Things to Confirm Before Ordering
Your CT6 trim (Platinum or V) and year
The engine code, confirmed by VIN
That you need the 4.2 twin turbo V8, not a four or six cylinder
Your shop is ready for an engine swap
What Is Included, What Is Not Included
| Item | Details |
|---|---|
| INCLUDED | The complete used long block for the engine code you confirm. |
| NOT INCLUDED | Turbos, accessories, and external parts beyond the long block, unless noted or ordered. |
| Tools You Need | A qualified shop for the swap, including accessory transfer, mounts, fluids, and any required programming. |
Vehicle Compatibility
This Cadillac CT6 engine is offered for the following:
| Vehicle | Compatibility |
|---|---|
| Cadillac CT6 Platinum | 4.2L twin turbo V8, roughly 2019 to 2020 |
| Cadillac CT6-V | 4.2L twin turbo V8, confirm by VIN |
This engine is the 4.2 liter twin turbo V8 fitted to the top CT6 trims for about 2019 to 2020. It is not the four or six cylinder engine used in most CT6 cars. Confirm your trim and engine code by VIN at order, and we disclose the donor details before shipping.
Fitment Assistance
Not sure your CT6 has this engine? Call (240) 301-0095 with your VIN and we confirm the engine code before your order ships. We never want you to order the wrong powerplant.
Condition and Inspection
Quality control for this part includes:
Long block, heads, and external condition checked
Checked for major leaks at visible seals
Compression results documented and available on request
Donor details documented before packaging
This is a used engine inspected before listing, with compression results available on request. An engine swap is a major job, so we recommend a qualified shop for install, including accessory transfer, fluids, mounts, and any required programming.
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