2006 Chevy Impala SS with Two LS4 V8 Engines Tony Angelo is building a 2006 Chevrolet Impala SS with two V8 engines. The Impala came from the factory with a 5.3 L LS4 V8 making 303 hp (226 kW) and 323 lb-ft (438 Nm) of torque paired with a 4T65...