Cadillac CT6 Engine for Sale | 4.2L Twin Turbo V8 Blackwing

Description

About the Cadillac CT6 Engine (4.2L Twin Turbo V8 “Blackwing”)

Need a replacement Cadillac CT6 4.2L Twin Turbo V8 engine? Part Nests sources OEM used 4.2L Twin Turbo V8 long blocks for Cadillac CT6 applications. Critical differentiation – this listing is the 4.2L Twin Turbo V8 variant of the CT6 engine lineup, distinct from the more common CT6 engines (2.0T inline-4, 3.6L NA V6, 3.0L Twin Turbo V6). The 4.2L Twin Turbo V8 (GM engine code LTA, commonly known as the “Blackwing” V8) is Cadillac’s flagship V8 engine developed specifically for the CT6 flagship sedan lineup – a dedicated, low-volume premium V8 engineered as a distinctive Cadillac flagship powertrain. Used in the Cadillac CT6 Platinum trim and the Cadillac CT6-V performance flagship variant, approximately 2019-2020 model years for the US market. The 4.2L Twin Turbo V8 represents Cadillac’s brief mid-to-late 2010s effort to produce a bespoke Cadillac flagship V8 engine, contrasting with Cadillac’s traditional use of shared GM V8 architectures across other flagship applications. Long block scope per the source data. Sound block, heads, and external condition verified per unit. No major leaks at the visible seals and gaskets. Compression results available on request before you pay. Turbos, accessories, and external parts beyond the long block NOT included unless noted or ordered. Qualified shop required for swap, including accessory transfer, mounts, fluids, and any required programming. Also see our related 2016 Cadillac CT6 Engine listing for the more common 2.0T inline-4 / 3.6L V6 / 3.0L Twin Turbo V6 CT6 engine variants context. Each engine is compression-check available with leak inspection performed. Call (855) 634-4447 to verify CT6 4.2L Twin Turbo V8 engine code by VIN before ordering.

Vehicle and Engine Code Verification

What Is Included and Not Included

Cadillac CT6 Vehicle Context (4.2L Twin Turbo V8 Flagship Variant)

• Cadillac CT6 flagship sedan: The Cadillac CT6 is Cadillac’s full-size flagship luxury sedan positioning – Cadillac’s flagship US-market sedan offering positioned above the CTS (later CT5) midsize luxury sedan. The CT6 was Cadillac’s re-entry into the full-size flagship luxury sedan market segment after the discontinuation of previous Cadillac flagship sedan applications
• 4.2L Twin Turbo V8 flagship trim context: Per the source data compatibility, Cadillac CT6 Platinum – 4.2L twin turbo V8, roughly 2019 to 2020, and Cadillac CT6-V – 4.2L twin turbo V8, confirm by VIN. The 4.2L Twin Turbo V8 is exclusive to two specific top-tier CT6 variants – CT6 Platinum trim and CT6-V performance variant. Approximately 2019-2020 US-market production window for these V8-equipped variants
• CT6 Platinum trim: The Cadillac CT6 Platinum was Cadillac’s top-tier luxury flagship trim of the CT6 lineup – equipped with the 4.2L Twin Turbo V8 as the flagship engine. Represents Cadillac’s premium flagship sedan positioning with full luxury equipment and the exclusive V8 powertrain
• CT6-V performance variant: The Cadillac CT6-V (also known as the Cadillac CT6-V Blackwing or CT6-V Series) was Cadillac’s V-Series performance variant of the CT6 lineup – equipped with the 4.2L Twin Turbo V8 as the performance flagship engine. Represents Cadillac’s performance luxury flagship positioning
• Blackwing V8 nickname: The 4.2L Twin Turbo V8 is commonly known as the “Blackwing” V8 – a dedicated Cadillac-engineered V8 developed specifically for the CT6 flagship applications during the era. Represents Cadillac’s brief mid-to-late 2010s effort to produce a bespoke Cadillac flagship V8 engine (subsequently discontinued with the CT6 production end)
• CT6 production end context: The Cadillac CT6 was discontinued for the US market after the 2020 model year as part of GM’s sedan portfolio restructuring. The 4.2L Twin Turbo V8 Blackwing engine was discontinued with the CT6 end of production – subsequent Cadillac performance / flagship applications use different engine architectures
• Differentiation from other CT6 engines: Critical differentiation – the 4.2L Twin Turbo V8 is distinct from the more common CT6 engine variants including the 2.0L Turbo inline-4 (base CT6 trims), the 3.6L V6 (mid-range CT6 trims), and the 3.0L Twin Turbo V6 (CT6 Sport / higher trims, see our related 2016 Cadillac CT6 Engine listing for the 3.0L TT V6 and other CT6 engine variants context). The 4.2L Twin Turbo V8 is the exclusive flagship V8 variant

4.2L Twin Turbo V8 Engine Function and Verification Context

• 4.2L Twin Turbo V8 engine architecture: The 4.2L Twin Turbo V8 (GM engine code LTA) is a dedicated Cadillac twin-turbocharged V8 engine developed specifically for CT6 flagship applications. 4.2L displacement with twin-turbocharged induction architecture. Represents Cadillac’s approach to a bespoke luxury flagship V8 powertrain
• Blackwing engine nickname: The 4.2L Twin Turbo V8 is commonly referred to as the “Blackwing” V8 – a distinctive Cadillac engineering effort to produce a bespoke Cadillac flagship V8 engine during the mid-to-late 2010s era
• Long block scope: Per the source data included, the complete used long block for the engine code you confirm. Long block scope includes the engine block, heads, valve train, and timing components as the base long block scope. Additional items (turbos, accessories, external parts) are separate items – obtain / confirm separately or order additional coverage
• Sound block/heads/external inspection: Per the source data long block, sound block, heads, and external condition. Long block condition verification – block structural integrity sound, cylinder heads sound, external engine condition sound. Standard used long block condition documentation
• Leak inspection: Per the source data leaks, no major leaks at the visible seals and gaskets. Leak inspection verification – no major visible leaks at the various engine seals and gaskets. Standard used engine condition documentation for gasket / seal integrity
• Compression testing: Per the source data compression, results available on request before you pay. Compression testing results available upon request – verify compression readings before payment for engine mechanical condition confirmation
• Turbos not included: Per the source data, turbos, accessories, and external parts beyond the long block, unless noted or ordered. Critical scope note – the twin turbochargers are NOT included in the long block scope. Turbochargers are separate items – obtain / confirm separately or order additional turbo coverage
• Qualified shop swap requirement: Per the source data tools note, a qualified shop for the swap, including accessory transfer, mounts, fluids, and any required programming. Critical installation requirement – 4.2L Twin Turbo V8 engine swap requires qualified engine shop including accessory transfer, engine mount work, fluid service, and any required engine programming. Not a DIY project

Related Cadillac / Related V8 / Related Flagship Listings

• 2016 Cadillac CT6 Engine: Related CT6 engine application (2016 CT6 – 2.0L Turbo inline-4, 3.6L V6, or 3.0L Twin Turbo V6, more common CT6 engine variants) – see our 2016 Cadillac CT6 Engine listing
• Hummer H2 Engine: Related GM V8 engine application (Hummer H2 6.0L Vortec V8 or 6.2L L92 V8) – see our Hummer H2 Engine listing
• SRT8 Engine: Related Mopar performance V8 application (6.1L HEMI or 6.4L/392 HEMI) – see our SRT8 Engine listing
• Various Cadillac / flagship V8 / premium engine replacement components available across our Part Nests catalog

Engine Specifications

• Type: OEM used 4.2L Twin Turbo V8 long block (LTA / “Blackwing” V8) for Cadillac CT6 flagship applications
• Function: Twin turbocharged 4.2L V8 engine provides flagship-tier propulsion for CT6 Platinum / CT6-V
• Configuration: 4.2L Twin Turbo V8, ~2019-2020 CT6 Platinum or CT6-V applications – verify by VIN
• What is not included: Turbos, accessories, and external parts beyond the long block, unless noted or ordered per the source data
• Tools required: Qualified shop for the swap including accessory transfer, mounts, fluids, and any required programming per the source data
• Common failure modes: Various turbocharged V8 engine wear patterns, various age-related component wear. Symptoms include turbo integration issues, performance degradation, various engine integration issues
• Testing: Long block inspected, leak checked, compression results available on request per unit before shipment

Vehicle Compatibility

Why Buy From Part Nests

• OEM verified 4.2L Twin Turbo V8 long block for Cadillac CT6 flagship applications
• Sound block/heads/external inspected, leak checked, compression results available on request per unit
• Support for engine code verification by VIN (LTA / Blackwing 4.2L TT V8)
• Support for trim verification (CT6 Platinum or CT6-V)
• Support for critical scope differentiation vs other CT6 engine variants (2.0T / 3.6 V6 / 3.0 TT V6)
• Support for turbo scope clarification (turbos NOT included unless ordered)
• Support for qualified shop swap requirement
• Related to broader CT6 engine listings (2016 CT6 for 2.0T/3.6/3.0TT context) and Cadillac / flagship V8 listings
• Free shipping to all 50 states
• 15 day replacement warranty on component defects
• Support team familiar with Cadillac CT6 flagship sedan lineage and bespoke Blackwing V8 engineering context
• Call (855) 634-4447 to confirm your CT6 4.2L Twin Turbo V8 engine code by VIN before ordering.