Horsepower: 525 HP

Torque: 498-494 LB-FT

Big Power for the Drag Strip

Chevrolet Performance’s DR525 sealed drag racing crate helps enable exciting heads-up racing at a lower cost than custom-built engines. It’s an approach Chevrolet Performance implemented in a number of circle track racing series, providing racers with a high-performance engine at a great value.

The DR525 is designed as the spec engine for NMCA’s LS Stock racing class in the LSX Showdown Challenge Series. The 6.2L (376 cubic inches) naturally aspirated engine is rated at 525 horsepower and features several tamper-proof bolts to ensure class compliance. And while it is the spec engine for the LS Stock class, the DR525 is legal in other classes and drag racing series.

It is offered with two part numbers: 19434600 (includes Chevrolet Performance’s Muscle Car Oil Pan) and 19434599 (includes a Gen 4 F-body oil pan). Chevrolet Performance’s custom-calibrated E67-type control system - P/N 19432870 (sold separately, must use C10 fuel only)—must be used with the DR525 in the LS Stock class. It features a tamper-proof engine control unit.

INSTALLATION NOTES

• Assembly does not include any electronics
• Use DR525 Engine Controller Kit for engine operation, P/N 19432870
• Not intended for marine applications
• Front-End Accessory Drive Kit, P/N 19329418, not included with engine assembly
• Must use C10 fuel only

TECH SPECS

• Part Number: 19434600 (w/Muscle Car Oil Pan) 19434599 (w/Gen 4 F-Car Oil Pan)
• Engine Type: LS-Series Gen IV Small-Block V-8
• Displacement (cu in): 376 (6.2L)
• Bore x Stroke (in): 4.065 x 3.622 (103.25 x 92mm)
• Block( P/N 12729604): Cast aluminum with 6-bolt, cross-bolted main caps
• Crankshaft (P/N 12736808): Nodular iron
• Connecting Rods (P/N 12649190): Powdered metal
• Pistons (P/N 19207287): Hypereutectic aluminum
• Camshaft Type (P/N 88958770): Hydraulic roller
• Valve Lift (in): .525 intake / .525 exhaust
• Camshaft Duration (@.050 in): 226° intake / 236° exhaust
• Cylinder Heads (P/N 12675871): 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, roller trunnion
• Rocker Arms (P/N 12681275 exh): Investment-cast, roller trunnion
• Rocker Arm Ratio: 1.7:1
• Recommended Fuel: Premium pump
• Maximum Recommended rpm: 6,600
• Reluctor Wheel: 58x
• Balanced: Internal