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The race-ready LS built for the strip


Meet the DR525 crate engine. It’s an iconic small-block LS3 6.2L with the powerful ASA camshaft, and now in
a competition drag racing application. The engine comes factory sealed so you can go from the crate to the staging lanes in minimal time, with no modifications. Initially designed as the spec engine for National Muscle Car Association’s new LS Stock racing class, the DR525 is the perfect choice for spec-class racing or if you just want to update your bracket-racer with an electronic fuel-injected powerhouse.


On the inside, the DR525 crate engine is built out with components designed to meet the high standards of competitive racing. The 376-cu.-in. aluminum block is packed with a sturdy reciprocating assembly that combines with LS3-type rectangular-port heads to deliver a 10.7:1 compression ratio. A high-lift, hydraulic roller camshaft delivers a whopping 0.525-inch of lift on the 2.16-inch intake valves and 0.525-inch lift on the 1.59-inch exhaust valves, enhancing the LS3’s tremendous airflow and broad torque curve.

  • Horsepower

    525 HP

  • Torque

    494 LB-FT

  • Tech Specs

    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 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.): .525 intake / .525 exhaust

    Camshaft Duration (@0.050 in.): 226° intake / 236° exhaust

    Water Pump (P/N 12604630): LS3

    Cylinder Heads (P/N 12629063): Aluminum L92-style port; “as cast” with 68-cc chambers

    Valve Size (in.): 2.165 intake / 1.590 exhaust

    Compression Ratio: 10.7:1

    Rocker Arms (P/N 12569167): Investment-cast, roller trunnion

    Rocker Arms (P/N 10214664 exh): Investment-cast, roller trunnion

    Rocker Arm Ratio: 1.7:1

    Recommended Fuel: 92 octane

    Maximum Recommended rpm: 7000

    Reluctor Wheel: 58X

    Balanced: Internal

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