The LS7 is the largest factory-installed small-block Chevy V-8 ever, displacing 427.8 cubic inches or just over 7.0 liters. It featured the same bore as the 1970s 400-cubic-inch engine of 4.125 inches (104.8 mm), but unlike the 400, the LS7 got a full 4.00-inch (102 mm) stroke crankshaft.