Using a 7.0-liter aluminum dry-sump block, CNC-ported cylinder heads, and titanium rods and valves this engine pumps out 505 hp and 470 lb-ft of torque. As an example of its efficiency, the LS7 helps the '06 ZO6 get over 28 mpg while still being the fastest Corvette ever produced.
Based on the LS9, the LSA uses a unique aluminum-cylinder block casting that houses a forged steel crankshaft, integrated piston cooling oil jets, high-flow cylinder heads, and relatively mild camshaft to produce 556 horsepower and 551 lb-ft of torque. It has a slightly smaller supercharger than the LS9 and comes with a conventional wet-sump lubrication system.
Long rumored to be everything from the powerplant for the new Corvette Stingray and/or Camaro to a truck engine, the supercharged LS9 is now available in crate form. While it shares the 6.2L displacement of other LS engines, the LS9 features a stronger block casting, stronger cylinder head castings, and steel cylinder liners that are honed with a deck plate installed to maximize performance and cylinder sealing. Coupled with a Roots-style supercharger, this engine in the ZR1 Corvette produces 638 horsepower and 604 lb-ft torque.