525RLB Off-Road Racing

These engines are hand built with upgraded components for durability when used in racing applications but meet the HP/Torque requirements of the classes currently using the LS376-525.

They are equipped with GM factory anti-tampering seals at the cylinder heads, timing cover and oil pan and are track verifiable by tech officials.

 

Technical Specifications:

* Engine Type: LS-Series Gen IV Small-Block V-8
* Displacement (cu. in.): 376 (6.2L)
* Bore x Stroke (in.): 4.065 x 3.62 (103.25 x 92mm)
* Block: Cast aluminum with 6-bolt, cross-bolted main caps
* Crankshaft: Nodular iron
* Connecting Rods: Powder metal with ARP bolts
* Piston: Forged aluminum
* Camshaft Type: Hydraulic roller
* Valve Lift (in): .525 intake / .525 exhaust
* Camshaft Duration (@.050 in): 226° intake / 236° exhaust
* Cylinder Heads: LS3 rectangular port; aluminum as-cast with 68cc chambers
* Valve Size (in): 2.165 intake / 1.590 exhaust
* Compression Ratio: 10.7:1 Nominal
* Rocker Arms (P/N: 12696105 int.): Investment-cast, roller trunnion
* Rocker Arms (P/N: 12681275 exhaust): Investment-cast, roller trunnion
* Rocker Arm Ratio: 1.7:1
* Recommended Fuel: Premium pump
* Maximum Recommended rpm: 6,700
* Reluctor Wheel: 58x
* Balanced: Internal

 

Installation notes:
• Forged pistons with performance ring package.
• Heavy duty engine bearings.
• SFI certified Racing Harmonic Balancer pinned to the crankshaft.
• Upgraded timing chain damper and guide.
• Racing oil pan with #10 inlet/outlet for remote filter & cooler.
• Racing vented valve covers.
• For racing applications only - not intended for street use and is sold as is with no warranty!

Sold as show without intake manifold, water pump, starter, exhaust manifolds or front accessory drive system.