Autoblog and Yahoo may earn commission from links in this article.End of the RoadChevrolet has dropped the LS9 long-block V8 crate engine on its website, labeling it as “Discontinued.” The automaker instead points customers toward the LSX376-B15, which makes less power on paper but, like the LS9, is capable of supporting boost for tuners looking for forced induction, whether turbocharged or supercharged.At the same time, Chevrolet teased what could potentially be a new engine, though no details were disclosed. In an Instagram post, the teaser simply read, “Something BIG is coming,” which could be tied to the new sixth-generation 6.7-liter naturally aspirated small-block LS6 V8 powering the returning Corvette Grand Sport for the 2027 model year.Under the HoodWhile waiting for more details, the now-discontinued LS9 came with a factory supercharger, pushing output to 638 horsepower and 604 lb-ft of torque. The engine used a cast-aluminum block fitted with a forged steel crankshaft, forged titanium connecting rods, and forged aluminum pistons. As a long block, it also included cylinder heads, giving builders a more complete factory-built foundation that could save work and improve reliability.AdvertisementAdvertisementThe LS9 debuted in 2009 and powered high-performance models like the C6 Corvette ZR1. In the current C8 generation, the ZR1 nameplate has moved to a twin-turbocharged setup.On the other hand, the B15 crate engine, as the name suggests, is capable of supporting up to 15 psi of boost. That is made possible by an iron block paired with an all-forged rotating assembly. It does not come with factory forced induction, leaving builders room to pursue either modest or more aggressive boost setups. For now, output stands at 473 horsepower and 444 lb-ft of torque.ChevroletChevrolet’s V8 Evolution ContinuesThe B15 costs around $13,000, though the price increases once additional components such as an intake manifold and oil pan are added. The bigger expense, of course, is the forced-induction setup itself, meaning builders are expected to spend a lot more beyond the crate engine itself.With the LS9 out, Chevrolet’s LS engine lineup continues to shrink as the newer LT engine series has largely taken over since the C7 Corvette generation. In the C8 Corvette lineup, both the Stingray and E-Ray use the LT2, with the latter adding an electric motor to become the first electrified Corvette. The Z06 uses the naturally aspirated LT6, while the more extreme ZR1 gets the twin-turbocharged LT7. The ZR1X also uses the LT7, but pairs it with a front electric drive unit for a combined 1,250 horsepower.ChevroletView the 3 images of this gallery on the original articleAdvertisementAdvertisementThis story was originally published by Autoblog on May 20, 2026, where it first appeared in the News section. Add Autoblog as a Preferred Source by clicking here.