More than 400 hp and 400 lb-ft of torque from our Corvette engine!

As one of the newest members of the LS engine family, the LS3 6.2L engine has benefited from all of the forward thinking technology that has kept this engine series at the forefront of modern performance. Inside, the LS3 is filled with components designed for high performance and longevity.

The LS3 was introduced as the Corvette's new base engine for the 2008 model year. It produces 424 bhp (316 kW)@5900rpm and 418 lb·ft (567 N·m)@4600rpm without the optional Corvette exhaust and is SAE certified. The block is an updated version of the LS2 casting featuring a larger bore of 4.06 in (103.1 mm) creating a displacement of 6,162 cc (6.162 L; 376.0 cu in). It also features higher flowing cylinder heads sourced from the L92, a more aggressive camshaft with 0.551" lift, a revised valve train with 6 mm (0.24 in) offset intake rocker arms, a high-flow intake manifold and 47 lb/hr fuel injectors from the LS7 engine.

The L76/L92/LS3 cylinder heads use 2.165 in (55 mm) intake valves, and 1.59 in (40.4 mm) exhaust valves. Improved manufacturing efficiency makes these heads cheaper than the outgoing LS6 heads, and severely undercuts aftermarket heads. The large valves, however, limit maximum rpm - 6000 in the L76 (with AFM), and 6600 in the LS3 (with hollow stem valves).

In addition to the above, a dual mode exhaust package with a bypass on acceleration is available. The dual-mode exhaust uses vacuum-actuated outlet valves, which control engine noise during low-load operation, but open for maximum performance during high-load operation. The system is similar to the C6 Z06, but uses a 2.5 in (63.5 mm) diameter exhaust compared to the Z06's 3 in (76.2 mm). Power is boosted to 436 hp (325 kW) and 428 lb·ft (580 N·m) with this option.

From April 2008, Australian performance car manufacturer, HSV, adopted the LS3 as its standard V8 throughout the range, replacing the LS2. The LS3 received modifications for its application to HSV E Series models, producing 425 bhp (317 kW). The LS3 engine in the E Series II GTS (released September 2009) was upgraded to produce 436 bhp (325 kW).