LS376 525 HP FI Chevrolet Performance Crate Engine
Fuel-Injected ferocity for performance cars of all ages What do you get when you take Chevrolet Performance’s aggressive ASA camshaft – developed for the high-rpm world of circle-track racing – and slip it into an LS3 6.2L engine? The answer is 525 horsepower in one of our most powerful production-based crate engines. We call it the LS376/525 and if take-no-prisoner performance is what you’re lookingfor in your new Camaro or rest-mod Chevelle, this is it!
The ASA camshaft is a hydraulic roller with .525-inch lift on both sides, along with 226 degrees duration on the intake side and 236 degrees on the exhaust side. Coupled with a tight, 110-degree lobe separation angle, it helps the engine deliver excellent throttle response and breathe exceptionally well at high rpm. And for durability, we complement the cam with higher-rate valve springs.
You’ll need tuning to make the most of the engine in a late-model GMvehicle. If you plan to use the LS376/525 in a vintage car, you’ll need controller kit P/N 19259261, which includes the throttle pedal to match its electronically controlled throttle body. Check out our LS1 Engine Kit Installation Guide P/N 88959384 for details on installing an LS engine in a vintage vehicle.
Note: the flex plate installed on engine is for Corvette use only.
Engine Type: LS-Series G en I V Small-Block V-8
Displacement (cu in): 376 cu in (6.2L)
525 HP @ 6,300 RPM
489 LB-FT @ 4,400 RPM
Bore x Stroke (in): 4.065 x 3.622 (103.25 x 92mm)
Block (P/N12623967): 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 12569167 int): Investment cast, roll trunnion
Rocker Arms (P/N 10214664 exh): Investment cast, roll trunnion
Rocker Arm Ratio: 1.7:1
Recommended Fuel: 92 octane
Maximum Recommended RPM: 6,600
Reluctor Wheel: 58X
Balanced: Internal
Chevrolet Performance does not utilize any used or
remanufactured parts in this crate engine, except for
the starter, alternator and power steering pump.
This small-block V-8 dreams big, displacing big-block cubic inches at 7.0 Liters (427 cubic inches) and big-block power at 505 hp at 6200 rpm. It also benches 475 lb.-ft. of torque at 4800 rpm. Helping to create its high power and high revving capability are details such as cylinder heads with computer numerical control (CNC) intake and exhaust ports and combustion chambers - which creates ports with surgical accuracy for maximum power production. In addition, the intake valves and connecting rods are made out of high-strength lightweight titanium.The LS7 engines are assembled by hand at GM Powertrain's new Performance Build Center in Wixom, Mich.
Most Powerful Small-Block Ever - Available in a Crate
DETROIT - Chevrolet unveiled the 2006 Corvette Z06 at Detroit's North American International Auto Show in January, and now GM Performance Parts is unveiling the crate engine version of the LS7 engine that powers it.
This latest Z06, billed as "the fastest, most powerful car ever offered by Chevrolet and GM," has enthusiasts looking for that kind of power in a crate engine.
This small-block V-8 dreams big, displacing big-block cubic inches at 7.0 Liters (427 cubic inches) and big-block power at 505 hp at 6200 rpm. It also benches 475 lb.-ft. of torque at 4800 rpm. Helping to create its high power and high revving capability are details such as cylinder heads with computer numerical control (CNC) intake and exhaust ports and combustion chambers - which creates ports with surgical accuracy for maximum power production. In addition, the intake valves and connecting rods are made out of high-strength lightweight titanium.
The LS7 engines are assembled by hand at GM Powertrain's new Performance Build Center in Wixom, Mich.
Enthusiasts who must have the latest technology, maximum horsepower and the largest production cubic-inch displacement small-block ever built will be able to purchase the LS7, as well as other GM Performance Parts crate engines, blocks, heads and components. Following the release of the LS7 in a crate, GMPP will offer select parts, such as the crankshaft, connecting rods, cylinder heads and valves separately, and in kit form.
LS7 specifications:
Horsepower: 505 @ 6300 rpm
Torque (lb.-ft.): 470 (644 Nm) @6300 rpm
Engine type: Cam-in-block 90-degree V-8
Displacement (L/cu in): 7.0 / 427
Bore x stroke (mm/in) 104.8 x 101.6 / 4.125 x 4.00
Block: Cast aluminum with pressed-in cylinder sleeves and 6-bolt, forged steel main bearing caps
Crankshaft: Forged steel
Connecting rods: Forged titanium
Pistons: Cast aluminum
Camshaft type: Hydraulic roller, 15 mm (.591 in) lift (intake and exhaust)
Cylinder heads: CNC-ported aluminum; 70-cc chamber volume
Valve size (mm/in): 56 / 2.20 (titanium) intake / 41 / 1.61 (sodium-filled) exhaust
Compression ratio 11.0:1
Rocker arms: 1.8:1; offset (intake only)
Recommended fuel: Premium required. 91 octane minimum
LS7 crate engine includes:
Intake manifold with injectors
Injector wiring harness
Fuel rails
Throttle body
Dry sump oil pan
Exhaust manifolds
Flywheel & clutch
Harmonic dampener
Water pump and pulley
Coil Packs, spark plugs and wires
Engine sensors
LS7 crate engine does not include:
Dry sump oil lines
Dry sump tank
Engine beauty cover
Engine processor
Air filter/air box
Accessories or accessory drive
Engine control harness
Engine control module (ECU)
