ATK Engines SPE4271500 Elite Series Short Block Features:

• Dart LS Next SHP Skirted Block features a full skirt design with a priority main oiling system, steel four bolt main caps and accepts a 4 or 6 bolt cylinder head
• Dart BILLET Crankshaft can handle over 2000 HP and outfitted with Center Counter Weights that adds material and strength to the center of the crank that counters the jump rope effect under high RPM and increased power
• Manley H Tuff H-Beam Connecting Rods are fully machined and include double-ribbed pin surround and increased cross sectional thickness in critical areas
• JE Ultra Series Pistons include a thermal barrier crown coating, lateral gas ports, thick-wall wrist pins and a new forging technology for Massive Power and Boost right out of the box
• JE Pro Steel Rings maximize horsepower through precision sealing of combustion pressure. This ring pack will have a carbon steel top ring for high boost applications
• Clevite H Bearings are well suited for High Performance applications and high revving engines
• Suitable for a Single or Twin Turbo application

ATK Engines SPE4271500 Elite Series Short Block Specs:

• Compression Ratios with .051 in. Gasket:
  • 66 cc= 10.65:1 / 68 cc= 10.4:1 / 70 cc= 10.2:1
• Bore: 4.125 in.
• Stroke: 4 in.
• Displacement: 427 ci.
• Crankshaft: Dart Billet w/58 tooth reluctor wheel
• Rods: Manley H Tuff 4340 forged H-beam 6.125 in. w/ARP 2000 bolts
• Pistons: JE Ultra Flat Top 2618 Forged with Thermal Coating, Lateral Gas Ports, .200 in. Pin
• Rings: JE Pro Seal with Carbon Steel Top Ring
• Camshaft Bearings: Installed & Positioned to OEM Position
• Freeze Plugs: Installed with Sealant
• Oil Galley Plugs: Installed with Sealant

ATK Engines SPE4271500 Recommended Components (Each Sold Separately):

• Balancer Internally balanced
• Flexplate Internally balanced
• Head Gasket .051 in. Compressed Thickness
• Melling Oil Pump 10296 with red spring
• 20W50 NON-SYNTHETIC Oil for first 3000 miles

Emissions Note:

This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

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