The Lemon Index
Chevrolet's 5.5 L twin-turbo V8, DOHC in the Corvette ZR1, model years 2025.
Middle of the pack: YouTube owner tone 51/100, #66 of 165 engines with a YouTube study (in the middle third); no engine-related recall on record.
Everyday cars with this engine Tap a year for that car's full report.
Model years from EPA version lists. Only years we have a car page for.
Reliability by year
Not enough complaints to chart. We found no government complaints we can tie to this engine's cars. Supercars sell in small numbers, so we show YouTube, recalls and the automaker's repair notes instead.
How we count: owner complaints only where the car's name and year leave no doubt; YouTube tone from videos that name this engine or its cars. How we count
Owner complaints (NHTSA) are filed by model and year, not engine. We count one for this engine only when the model name and year had no other engine (e.g. "488 GTB", "GT-R"), or when the owner's own words name a version that had only this engine that year (Z06, ZR1, Hellcat, GT500 ...). They cover the whole car (wheels, air bags, electrics ...), not only the engine, and none of them is a failure rate. We chart them only for engines with 30 or more, over 3 or more years. YouTube tone = how positive the videos are, 0–100, from titles and transcripts (praise vs trouble words, the title counts 3 times), weighted by views; a year needs at least 3 videos' worth. A video counts for this engine when its title names the engine or a car that only had this engine in the years it names; a video whose title names no model year counts toward every year of that car, so neighboring years share most of their videos.
All the numbers, year by year
| Year | Cars | Owner complaints | YouTube says | Recalls |
|---|---|---|---|---|
| 2025 | Corvette ZR1 | 0 | 51 (56 videos) | 0 |
Recalls on cars with this engine
No NHTSA recalls we can tie to this engine's cars.
Every US version with this engine
| Car and versions | Years |
|---|---|
| Chevrolet Corvette Z06 Corvette ZR1 · Chevrolet Corvette, every year | 2025 |
Engine code: LT7 (Gemini family). Power: 1,064 hp, factory figures. Versions and years: EPA (fueleconomy.gov). Sources: Chevrolet Gemini small-block engine · Chevrolet Corvette (C8).
Quick answers
What cars have the Chevrolet LT7 engine?
In the US: the Chevrolet Corvette ZR1, model years 2025–2025. See the version table for each one.
Is the Chevrolet LT7 reliable?
Mostly. YouTube owner tone 51/100, #66 of 165 engines with a YouTube study (in the middle third); no engine-related recall on record. Not enough owner complaints to judge it per car: supercars sell in small numbers. Have any used car inspected.
How much horsepower does the Chevrolet LT7 make?
1,064 hp in factory figures, depending on the car.