Recently discovered General Motors trademark applications for LT4, LT5, LT88 and LTX have observers wondering what kind of high-performance offerings could be on their way. A new LT4 would mark a return of the engine designation first used on the Corvette Grand Sport, SLP Pontiac Firehawk and SLP Chevrolet Camaro SS from 1996 and 1997. Supposition at Corvette Forum – which provided advance intel on the C7 like these leaked images – believes a new LT4 could go into the high-performance trim of the next-gen, 2015 Camaro that would be more powerful than the 580-horsepower Camaro ZL1.

Seeing an LT5 again would also be déjà vu – in its former life it was a 5.7-liter V8 for the C4 Corvette ZR-1 from 1990-1994 designed by Lotus, producing from 370 hp to 405 hp. A mix of rumor and hope is that the new LT5 will be a supercharged evolution of the 6.2-liter LT1 (pictured) placed in the new C7 Corvette, and that it will go into the C7 version of the ZR1 pumping out something like 700 hp.

The LTX trademark is, as with that last letter, a complete mystery. If the "X" isn't a generic way to denote the whole LT family, it's wondered if it LTX could refer to a crate motor offering like the LSX.


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  • 47 Comments
      Patrick
      • 1 Year Ago
      Mr. Burns : "Excellent"
      Yazeed Ahmad
      • 1 Year Ago
      Are you sure of the LT4 and LT88 trademarks? Cause I just looked it up in the United States Patent and Trademark Office. the LT4 is for Global Animal Products, Inc? and there are no results for the Lt88 trademark.
        Dawgz83948
        • 1 Year Ago
        @Yazeed Ahmad
        They used LT1, LT4, LT5 in the past, so it stands to reason that they should be able to use it again.
      Sobchak Walter
      • 1 Year Ago
      LT4 - Successor to the LSA. LT5 - Successor to the LS9 (for use in the ZR1). LT88 - Successor to the LS7 (spiritual successor to the L88 427); likely for duty in the next gen Z28, Z06. LTX - Successor to the LSX; aftermarket cast iron block. A capital X designates a cast iron aftermarket block. *See ZLX, LSX.
      • 1 Year Ago
      [blocked]
      MONTEGOD7SS
      • 1 Year Ago
      LT9 should be a supercharged LT1. The LT5 should be something completely unexpected and different, just like the C4 ZR-1. I vote for the upcoming Z06 to get something like that, and let the ZR1 keep the blown version.
      • 1 Year Ago
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        savvybynature
        • 1 Year Ago
        DCTs are in development and on the way for 2014 :-).
          • 1 Year Ago
          @savvybynature
          [blocked]
        Chris
        • 1 Year Ago
        If you want AWD, buy a Subaru. If that doesn't float your boat then buy a Charger R/T with AWD. Or, here's another idea, since you can afford to have more than one vehicle as you stated in one of your other posts, why not get a 4-weel drive truck, and save the RWD performance coupe/sedan for days when the roads aren't covered with snow and ice. I'm guessing the reason GM doesn't offer all of those options on cars like the SS is because they would be expensive, and the ends simply wouldn't justify the means. Knowing the way car companies seem to like bundling options together, I'm glad they don't offer all of those things.
        ImpulseGTO
        • 1 Year Ago
        They do NOT NEED to have AWD available for these cars! There is no need for it! Learn to drive better and you won't want AWD in a car anymore! Grow up!
          • 1 Year Ago
          @ImpulseGTO
          [blocked]
          • 1 Year Ago
          @ImpulseGTO
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          • 1 Year Ago
          @ImpulseGTO
          [blocked]
        • 1 Year Ago
        [blocked]
      Bobby Tiger MacRae
      • 1 Year Ago
      I would love to see an AWD Camaro take on the GTR!
        • 1 Year Ago
        @Bobby Tiger MacRae
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          • 1 Year Ago
          [blocked]
        • 1 Year Ago
        @Bobby Tiger MacRae
        [blocked]
        Mike F.
        • 1 Year Ago
        @Bobby Tiger MacRae
        I guess I would too, but WTH does that have to with this post?!
      Soul Shinobi
      • 1 Year Ago
      Wait a minute wait a minute, where are the camshafts? What happened to the rest of the valves?
      ISpoolOldSchool
      • 1 Year Ago
      I'd like to see them make the lt5 like the old one, DOHC
        • 1 Year Ago
        @ISpoolOldSchool
        [blocked]
          Sobchak Walter
          • 1 Year Ago
          Lotus design, built by Mercruiser. Known to be incredibly durable. However, the size, weight, and complexity killed it. It had a $25k cost over the (then next gen) LS1. It would have added significant amounts of weight for a relatively small boost in power. Ultimately, the same benefits were achieved with more advanced fuel injection and a lighter, leaner package. Check out Dave McLellan's book about the 'Vette. Tells the whole story.
          Dawgz83948
          • 1 Year Ago
          LT5 head, not block.
          • 1 Year Ago
          [blocked]
          Dawgz83948
          • 1 Year Ago
          May not happen, but it would be nice. LT5 block was a lotus design IIRC, however GM still owns the product. I think the NorthStar motors convinced GM to go simple, as those stupid motors leaked ALL the time.
      FierySolstice
      • 1 Year Ago
      I bet LTX would be for an AWD trim.
      Richard
      • 1 Year Ago
      I don't think anybody here has mentioned the SUV/Truck angle here. So I imagine that versions of the 5th gen motor will find their way into full size suvs, pickups and vans. This means that a few years down the road enthusiasts will have zillions of 5th gen engines in junkyards to be rebuilt and modded and swapped into anything that gets an LS swap now. Just poking around on youtube for a few minutes and you can see how many 10 second cars are powered by some GM LS truck motor that's been stroked, supercharged, turboed, etc.
        Peter DePriest
        • 1 Year Ago
        @Richard
        The truck engines are different though, they get different designations and sometimes iron blocks and heads instead of aluminum
          • 1 Year Ago
          @Peter DePriest
          [blocked]
      Dawgz83948
      • 1 Year Ago
      LTX may be the truck variant.
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