ATK High Performance Chrysler 408 Stroker Magnum 465 HP Stage 1 Long Block Crate Engines HP46-MAG

Buy ATK High Performance Chrysler 408 Stroker Magnum 465 HP Stage 1 Long Block Online

Unleash raw, American muscle power with the ATK High Performance Chrysler 408 Stroker Magnum 465 HP Stage 1 Long Block. Engineered for street performance and track-ready dependability, this precision-built crate engine transforms the classic Chrysler Magnum platform into a 465-horsepower, 500 lb-ft torque monster. Built from a hand-selected, hand-machined OE Magnum 5.9 magnum 408 stroker kit mopar 408 stroker crate engineblock, ATK expands the 360 magnum engine displacement to 408 cubic inches using a custom stroker crankshaft, forged/hypereutectic internal mopar 408 stroker crate engine components, and custom-matched cylinder heads.

Designed as a Stage 1 long block 408 crate motor assembly, this powertrain provides the ultimate solid foundation for hot rods, classic muscle car restorations, or high-performance truck builds. Every internal component—from the hydraulic roller 408 mopar crate motor camshaft to the high-flow aluminum cylinder heads—is dynamically balanced and rigorously 408 mopar crate motor inspected to deliver maximum throttle response, high-RPM stability, and reliable street drivability. Stop compromising on piecemeal engine rebuilds; upgrade your build with the turn-key reliability and extreme torque density of the ATK High Performance Chrysler 408 Stroker Magnum 465 HP Stage 1 Long Block to dominate the strip and street alike.

Product Specifications

Key Benefits

• Turn-Key Stroker Power: Upgrading from a standard 360 to a 408 cubic inch displacement generates massive low-end torque and peak horsepower without requiring a big-block swap.

• Precision Machined Assembly: Each engine block is hand-selected, deck-surfaced, bored, and honed with torque plates to ensure maximum cylinder ring seal and operational longevity.

• Pump Gas Friendly: Configured with a ~10.0:1 compression ratio, allowing you to maximize street performance on standard 91–93 premium pump gas without detonation issues.

• Smooth, Low-Maintenance Valvetrain: Features a hydraulic roller camshaft setup that delivers high-RPM stability, aggressive exhaust note, and reduced internal friction compared to traditional flat-tappet setups.

• Customizable Stage 1 Foundation: Delivered as a complete long block assembly (block, rotating assembly, heads, and valvetrain), giving you full control to choose your preferred intake manifold, fuel delivery (carburetor or EFI), and front-end drive setup.

What is included with the ATK High Performance Chrysler 408 Stroker Magnum 465 HP Stage 1 Long Block?

As a Stage 1 long block crate engine, it includes the fully machined block, stroker crankshaft, performance connecting rods, pistons, high-flow cylinder heads, dynamic camshaft, and complete valvetrain assembly. Accessories such as the intake manifold, carburetor/EFI, distributor, oil pan, and front belt drives are sold separately so you can customize your induction and accessory setup.

What fuel octane rating is required to run this engine safely?

Due to its performance compression ratio and aggressive street-strip timing, the ATK High Performance Chrysler 408 Stroker Magnum 465 HP Stage 1 Long Block is designed to run on premium unleaded pump gas (91–93 octane) to ensure optimal horsepower output and prevent detonation under heavy load.