The Power and Strength of Our LS Racing Engine in a Long Block
Chevrolet Performance’s 525 RLB is based on the LS engine family and is like the 6.2L CT525 but sold as a sealed long block for universal racing sanctioning bodies.
The high-revving 525 RLB crate engine is assembled with strong forged pistons and heavy-duty connecting rod bolts designed to support its performance capability and enhance its durability. With its deep-breathing LS3 rectangular-port cylinder heads, it is a combination rated at 533 horsepower at 6,600 rpm and a strong 477 lb.-ft. of torque at 5,200 rpm, when used with a 4-barrel carburetor and intake manifold, per Chevrolet Performance testing.
The engine assembly comes with coil-on-plug ignition and an SFI-certified balancer, along with a 6-quart racing oil pan and more. All that’s needed to complete the assembly is an induction and ignition system — and all those components are also available from Chevrolet Performance.
INSTALLATION NOTES
• Requires addition of induction and ignition control system, starter, fuel system, exhaust system and front accessory drive system
• The 6-quart racing oil pan is designed to clear most GM rear-steer chassis with stock engine location
• The long block is designed for universal racing sanctioning bodies. It is not intended for street use
• The 525RLB does not included water pump, intake manifold or factory exhaust manifolds
• Chevrolet Performance Racing Long Block engines include factory-installed anti-tampering seals
Specifications:
Power: 533 HP @ 6600 RPM, 477 ft. lbs. of torque @ 5200 RPM
Displacement: 376 CID, 6.2L
Bore x Stroke: 4.060” x 3.620”
Compression Ratio: 10.7:1
Recommended Fuel: 92 Octane
Block: Cast Aluminum with 6 bolt cross bolted main caps.
Crankshaft: Nodular Iron
Connecting Rods: Powdered Metal Steel
Pistons: Forged Aluminum
Camshaft: Steel Hydraulic Roller Tappet
Cam Lift: .525” Intake / .525” exhaust
Cam Duration @ .050”: 226 deg. Intake / 236 deg. Exhaust
Lobe Separation: 110 Degree
Cylinder Heads: Aluminum LS3 style rectangular ports.
Combustion Chamber: 68cc
Valves: 2.165” Intake/ 1.590” Exhaust
Rocker Arms: Cast Roller Trunnion, 1.7:1 Ratio
Balance: Internal
Reluctor: 58X
Maximum GM Recommended RPM: 6700
Engine Includes:
• Fully GM assembled long block
• Ignition Coils, Plug Wires and Spark Plugs
• Oil pump, pick-up and 6 quart oil pan
• SFI Certified Harmonic Balancer
• Front timing cover
NOTE: Does NOT include oil pump pick up tube, oil pan, spark plugs or racing seal bolts.
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