At 427ci, the Gen-4 LS7 is the largest displacement LS engine produced by GM. Used in the 2008 ZO6 Corvette, the LS7 compression is pump gas friendly at 11.0:1.
This monster features exotic titanium connecting rods and 2.20 titanium intake valves. The LS7 also features factory CNC ported square port cylinder heads and dry sump oiling. The 427ci is produced with the forged 4.0 inch stroke crank and 4.125 bore with same external dimensions of all other Gen-3 and Gen-4 LS engines.