LS376/525 Long Block

Product Details

GM LS engines are currently on backorder. We are happy to place one on order for you, or please consider this alternative option that is readily available. BluePrint Engines 376 c.i. GM LS style proseries engine: GM Performance Motor

Dipstick, Dipstick Tube, and Steam vent pipe do not come with Long Block engines and can be purchased below if using the included oil pan

LS376/525 Long Block

LS long-blocks from Chevrolet Performance offer the core capabilities of complete crate engines at a low cost, allowing builders to finish the assembly their way. The LS376/525 long block is delivered without the intake manifold, coil packs, water pump, exhaust manifolds or other accessories.

NOTE: LS376/525 Long Block is used to build LS376/515 crate engine

TECH SPECS
Part Number: 19420386 / 19432557 / 19434648
Engine Type: LS-Series Gen IV Small-Block V-8
Displacement (cu in): 376 cu in (6.2L)
Bore x Stroke (in): 4.065 x 3.622 (103.25 x 92mm)
Block (P/N 12623967): Cast aluminum with 6-bolt, cross-bolted main caps
Crankshaft (P/N 12597569): Nodular iron
Connecting Rods (P/N 12607475): Powdered metal
Pistons (P/N 19207287): Hypereutectic aluminum
Camshaft Type (P/N 88958770): Hydraulic roller
Valve Lift (in): 0.525 intake / 0.525 exhaust
Camshaft Duration (@0.050 in): 226° intake / 236° exhaust
Cylinder Heads (P/N 12629063): Aluminum L92-style port; as cast with 68cc chambers
Valve Size (in): 2.165 intake / 1.590 exhaust
Compression ratio: 10.7:1
Rocker Arms (P/N 12669995 int): Investment cast, roll trunnion
Rocker Arms (P/N 12669993 exh): Investment cast, roll trunnion
Rocker Arm Ratio: 1.7:1
Recommended Fuel: Premium pump
Maximum Recommended RPM: 6,600
Reluctor Wheel: 58x
Balanced: Internal

INSTALLATION NOTES
• Assembly does not include any electronics, intake manifold, fuel system , ignition. 
• Includes Chevy F-Body wet sump oil pan
• Intended for pre-1976 street vehicles or any off-road vehicle
• Not intended for marine applications

California Proposition 65 Warning