La verdad que me parece que es inspirado en otro, en todos los aspectos.
LS3
LS3 can also refer to a 402 CID Chevrolet Big-Block engine of the 1970s
The LS3 was introduced as the Corvette's new base engine for
the 2008 model year. It produces 430 bhp (321 kW; 436 PS) at 5900 rpm
and 424 lb·ft (575 N·m) at 4600 rpm 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 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-inch (14.0 mm) lift, a 10.7:1
compression ratio, a revised valvetrain 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 (55.0 mm) intake valves,
and 1.59 in (40 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 (64 mm) diameter exhaust
compared to the Z06's 3 in (76 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).
All HSV MY12.5 excluding the base Maloo and Clubsport variants have been
upgraded to produce 436 bhp (325 kW).