LS CRATE ENGINES
The engine family commonly called the LS series debuted in 1997. General Motors called it the Gen-III Small-Block, with the iron-block versions in trucks and the all-aluminum LS1 introduced in the then-new C5 Corvette. GM has continued to refer to its modern V-8 engine family as Gen III and Gen IV, but to the enthusiasts who quickly grasped the tremendous performance potential of the engines, every engine of the platform is nicknamed “LS.” See how LS crate engines compare in horsepower, torque, and other technical specifications.
Part Number
19301326
19301360
Engine Type
LS-Series Gen-IV Small-Block V-8
LS-Series Gen-IV Small-Block V-8
Horsepower
430 hp @ 5900 rpm
525 hp @ 6200 rpm
Torque
425 lb-ft @ 4600 rpm
486 lb-ft @ 5200 rpm
Displacement (cu. in.)
376 (6.2L)
376 (6.2L)
Block
Cast-aluminum with 6-bolt, cross-bolted main caps
Cast-aluminum with 6-bolt, cross-bolted main caps
Crankshaft
Nodular iron
Nodular iron
Camshaft
Hydraulic roller
Hydraulic roller
Valve Lift (intake)
.551 in
2.165 in
Valve Lift (exhaust)
.522 in
1.590 in
Camshaft Duration (@.050)
204° intake/211° exhaust
226° intake/236° exhaust
Cylinder Heads
Aluminum L92-style port; as cast with 68-cc chambers
Aluminum L92-style port; as cast with 68-cc chambers
Compression Ratio
10.7:1
10.7:1
LS3
MORE INFO
Part Number
19301326
Engine Type
LS-Series Gen-IV Small-Block V-8
Horsepower
430 hp @ 5900 rpm
Torque
425 lb-ft @ 4600 rpm
Displacement (cu. in.)
376 (6.2L)
Block
Cast-aluminum with 6-bolt, cross-bolted main caps
Crankshaft
Nodular iron
Camshaft
Hydraulic roller
Valve Lift (intake)
.551 in
Valve Lift (exhaust)
.522 in
Camshaft Duration (@.050)
204° intake/211° exhaust
Cylinder Heads
Aluminum L92-style port; as cast with 68-cc chambers
Compression Ratio
10.7:1
LS376/525
MORE INFO
Part Number
19301360
Engine Type
LS-Series Gen-IV Small-Block V-8
Horsepower
525 hp @ 6200 rpm
Torque
486 lb-ft @ 5200 rpm
Displacement (cu. in.)
376 (6.2L)
Block
Cast aluminum with 6-bolt, cross-bolted main caps
Crankshaft
Nodular iron
Camshaft
Hydraulic roller
Valve Lift (intake)
2.165 in
Valve Lift (exhaust)
1.590 in
Camshaft Duration (@.050)
226° intake/236° exhaust
Cylinder Heads
Aluminum L92-style port; as cast with 68-cc chambers
Compression Ratio
10.7:1
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